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NPI 1639218290 · Tamuning, GU · Internal Medicine Physician
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Young Chang is a internal medicine physician provider located in Tamuning, Guam. This profile covers 12 Medicare and 18 Medicaid CPT/HCPCS procedure codes, with claims volume, average reimbursement, and total revenue by code, benchmarked against other providers billing the same services.
Provider details (source: NPPES NPI Registry)
| Field | Value |
|---|---|
| Entity Type | Individual |
| Organization | Young Chang |
| Address | 416 Chalan San Antonio Rd |
| City | Tamuning |
| State | GU |
| ZIP | 96913 |
| Taxonomy | Internal Medicine Physician |
| NPI Enumerated | February 6, 2007 |
Lifetime revenue by payer source (source: CMS Medicare & Medicaid claims data)
| Payer Source | Total Paid |
|---|---|
| Medicaid | $998.5K |
| Medicare | $157.2K |
This provider is effectively Medicaid‑dominant by scale: Total Medicaid revenue is $998.5K compared with total Medicare revenue of $157.2K, indicating the practice derives the bulk of its billing from Medicaid patients. The NPI was enumerated on 2007-02-06 (~19 years ago), consistent with an established outpatient practice that has built a Medicaid patient base over time.
Medicare revenue is highly concentrated in evaluation & management visits: the top three Medicare codes account for 92.2% of the provider's total Medicare revenue, led by 99214 which generates $111K (70.4% of Medicare revenue) across 1.4K claims. The dominance of 99214 suggests the Medicare activity is centered on moderate‑complexity established patient office visits rather than procedures or specialty interventions.
Medicaid revenue shows an even stronger concentration in office visits: the top three Medicaid codes represent 97.0% of Medicaid revenue, with 99214 producing $720.4K (72.2%) and 99213 producing $233.5K (23.4%). This payor mix indicates a primary‑care/longitudinal outpatient service model for Medicaid beneficiaries, with new patient visits (99204) representing a much smaller share of Medicaid revenue.
Competitive standing diverges by payer: for Medicare the provider is an extreme outlier on 99214 nationally (rank #4593 of 479517, 99th percentile; "extreme outlier"), showing unusually high national volume for that office‑visit code while other Medicare codes are at more typical national percentiles. For Medicaid the provider is a clear in‑state leader on 99214 (rank #1 of 35, 100th percentile; "notably above typical state volume"), indicating dominant market share for established‑visit billing among local peers.
The practice bills a meaningful volume of vaccine and preventive codes across both payers, but these items contribute little to revenue totals. Examples include Medicare 90688 ($2.4K, 120 claims, 95th percentile) and Medicaid entries such as 90686 (457 claims, $1 avg paid/claim, $457 revenue, rank #1 of 9, 100th percentile) and multiple vaccine product codes with $0 avg paid/claim in Medicaid; this pattern signals high administration volume but low reimbursement contribution for immunizations in the dataset.
Several codes show high rank or volume yet negligible or zero average paid amounts in Medicaid (multiple product codes listed with $0 avg paid/claim), which is important for operational budgeting and reporting. The presence of high claim counts with $0 reported Medicaid payments for product codes (e.g., 91312, 91300, 90688 listed with $0 revenue) suggests that vaccine/product reimbursement may be handled outside clinic professional claims or that payer reporting yields little direct professional revenue.
Business concentration creates exposure to reimbursement changes because a small set of visit codes drives nearly all billed revenue in each payer: 92.2% of Medicare revenue and 97.0% of Medicaid revenue come from the top three codes. Any policy, reimbursement, or coding changes affecting office visit E/M codes (especially 99214 and 99213) would materially affect the provider's revenue profile.
Operational capacity is implied by high visit volumes, particularly in Medicaid: 99214 has 7.9K claims billed to Medicaid and 1.4K claims billed to Medicare, reflecting sustained high throughput of established patient visits. Combined with the long NPI tenure (2007-02-06, ~19 years ago), these volumes are consistent with a high-volume outpatient internal medicine practice focused on ongoing management of a predominantly Medicaid patient panel.
Medicare revenue breakdown by CPT/HCPCS procedure code.
View: Bar Chart1 / 2
The CPT/HCPCS codes generating the most Medicare revenue for this provider.
12 rows
| CPT/HCPCS Code | Description | Claims | Avg Paid | Revenue |
|---|---|---|---|---|
| 99214 | The provider sees an established patient for an office visit or other outpatient visit involving evaluation and management. The visit involves a moderate level of medical decision making, and/or the… | 1,390 | $80 | $111K |
| 99213 | The provider sees an established patient for an office visit or other outpatient visit involving evaluation and management. The visit involves a low level of medical decision making, and/or the… | 460 | $60 | $26.1K |
| 0124A | N/A | 210 | $40 | $8.3K |
| G0008 | Administration of influenza virus vaccine | 150 | $30 | $4.3K |
| 99204 | The provider sees a new patient for an office visit or other outpatient visit involving evaluation and management. The visit involves a moderate level of medical decision making, and/or the provider… | 50 | $70 | $3.1K |
| 90688 | This code represents a vaccine product administered into the muscle to protect against four strains of influenza (flu). It uses split virus technology and is given as a 0.5 mL dose. | 120 | $20 | $2.4K |
| 90686 | This code represents a vaccine product administered into the muscle to protect against four strains of influenza (flu). It is preservative free, uses split virus technology, and is given as a 0.5 mL… | 50 | $20 | $970 |
| 93000 | The provider records the electrical conduction of the heart to examine any abnormality in its functioning, based on signals from at least 12 leads, wires that connect the recording device to… | 50 | $10 | $530 |
| G0009 | Administration of pneumococcal vaccine | 20 | $30 | $420 |
| 99203 | The provider sees a new patient for an office visit or other outpatient visit involving evaluation and management. The visit involves a low level of medical decision making, and/or the provider… | 10 | $30 | $350 |
Showing 1–10 of 12
How this provider's Medicare billing volume and revenue compare to other providers nationally and within its state, across 12 CPT/HCPCS codes.
View: State1 / 2
Full comparison — all codes billed, vs. state median
Medicaid revenue breakdown by year and by CPT/HCPCS procedure code, including monthly billing trends and the top codes driving revenue.
View: By Year1 / 3
Every CPT/HCPCS code this provider has billed to Medicaid, with claims volume, average payment, and total revenue.
18 rows
| CPT/HCPCS Code | Description | Claims | Avg Paid | Revenue |
|---|---|---|---|---|
| 99214 | The provider sees an established patient for an office visit or other outpatient visit involving evaluation and management. The visit involves a moderate level of medical decision making, and/or the… | 7,920 | $90 | $720.4K |
| 99213 | The provider sees an established patient for an office visit or other outpatient visit involving evaluation and management. The visit involves a low level of medical decision making, and/or the… | 3,540 | $70 | $233.5K |
| 99204 | The provider sees a new patient for an office visit or other outpatient visit involving evaluation and management. The visit involves a moderate level of medical decision making, and/or the provider… | 90 | $160 | $13.6K |
| 90471 | In this procedure, the provider administers a live attenuated vaccine using a percutaneous, intradermal, subcutaneous, or intramuscular route. | 610 | $20 | $13.5K |
| 0124A | N/A | 330 | $30 | $9.1K |
| 0054A | N/A | 150 | $30 | $4K |
| 90472 | This code represents each injection of a vaccine after the first; list this code in addition to the code for the first injection. | 70 | $20 | $1.4K |
| 0004A | N/A | 20 | $40 | $680 |
| 0053A | N/A | 20 | $40 | $560 |
| 90686 | This code represents a vaccine product administered into the muscle to protect against four strains of influenza (flu). It is preservative free, uses split virus technology, and is given as a 0.5 mL… | 460 | $1 | $460 |
Showing 1–10 of 18
How this provider's Medicaid billing volume and revenue compare to other Guam providers billing the same CPT/HCPCS codes.
Full comparison — all codes billed, vs. Guam median
18 rows
| CPT/HCPCS Code | Description | Rank | Provider Count | Median Claims | Avg Paid | Average Revenue |
|---|---|---|---|---|---|---|
| 99213 | The provider sees an established patient for an office visit or other outpatient visit involving evaluation and management. The visit involves a low level of medical decision making, and/or the… | 13 | 50 | 900 | $80 | $201.7K |
| 99214 | The provider sees an established patient for an office visit or other outpatient visit involving evaluation and management. The visit involves a moderate level of medical decision making, and/or the… | 1 | 40 | 630 | $90 | $172.1K |
| 99204 | The provider sees a new patient for an office visit or other outpatient visit involving evaluation and management. The visit involves a moderate level of medical decision making, and/or the provider… | 7 | 20 | 60 | $140 | $20.8K |
| 90472 | This code represents each injection of a vaccine after the first; list this code in addition to the code for the first injection. | 5 | 10 | 180 | $30 | $16.7K |
| 90471 | In this procedure, the provider administers a live attenuated vaccine using a percutaneous, intradermal, subcutaneous, or intramuscular route. | 3 | 20 | 180 | $20 | $10.1K |
| 0124A | N/A | 1 | 10 | 230 | $30 | $7K |
| 0004A | N/A | 4 | 10 | 20 | $40 | $6.5K |
| 90739 | This code represents an adult–dosage vaccine product administered intramuscularly to protect against the liver disease hepatitis B. The product has a synthetic DNA called CpG added to improve the… | 3 | 10 | 30 | $50 | $4K |
| 0054A | N/A | 1 | 10 | 150 | $30 | $4K |
| 0064A | N/A | 3 | 10 | 30 | $40 | $3.8K |
Showing 1–10 of 18
Other providers in the same ZIP code as Young Chang, ranked by combined Medicare and Medicaid revenue.
| Provider | State | Taxonomy | Medicare Revenue | Medicaid Revenue |
|---|---|---|---|---|
| Thomas Lee | GU | Dentist | $0 | $10.9M |
| Guam Memorial Hospital | GU | General Acute Care Hospital | $0 | $3.5M |
| Rsa - Tumon, LLC | GU | End-Stage Renal Disease (ESRD) Treatment Clinic/Center | $0 | $2.9M |
| Robert Yang | GU | Dentist | $0 | $2.4M |
| Antonio Garcia | GU | Pediatrics Physician | $0 | $2.2M |
| Ma Gladys Linsangan | GU | Pediatrics Physician | $0 | $2.2M |
| Ari Katerelos | GU | Radiation Oncology Physician | $2.1M | $0 |
| Guam X-ray | GU | Vascular & Interventional Radiology Physician | $0 | $2.1M |
| Sarah Clegg | GU | General Practice Dentistry | $0 | $1.7M |
| Peter Kh Go | GU | Surgery Physician | $152.8K | $1.5M |
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