Jonathan Chang, M.D.
NPI 1851477954 · Geriatric Medicine (Internal Medicine) Physician · Forest Hills, NY
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jonathan Chang, M.D. is a Geriatric Medicine (Internal Medicine) Physician provider in Forest Hills, NY (NPI 1851477954).
Provider details
- NPI number
- 1851477954
- Entity type
- Individual
- Primary specialty
- Geriatric Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 236105 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,875 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More99308 | 1,602 | $83 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 273 | $117 |
Typical Medicare-allowed amounts for these services range $83–$117 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 70 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 187 | 34 |
| Memantine Hcl | 174 | 25 |
| Metformin Hcl | 146 | 25 |
| Atorvastatin Calcium | 136 | 25 |
| Tamsulosin Hcl | 129 | 18 |
| Paroxetine Hcl | 125 | 21 |
| Finasteride | 120 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$697 across 21 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-31
- Last updated
- 2013-04-20
Frequently asked questions
- What is Jonathan Chang's NPI number?
- Jonathan Chang's National Provider Identifier (NPI) is 1851477954, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jonathan Chang's specialty?
- Jonathan Chang is listed in the NPPES registry with a primary specialty of Geriatric Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Jonathan Chang located?
- Jonathan Chang's practice location on file with NPPES is 6750 Thornton Pl Apt 6h, Forest Hills, NY 11375-4183.
- What is Jonathan Chang's phone number?
- The practice phone number listed in the NPPES registry for Jonathan Chang is (917) 553-8246.
- Does Jonathan Chang accept Medicare?
- Jonathan Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jonathan Chang's NPI active?
- Yes — Jonathan Chang's NPI (1851477954) is active in the NPPES registry as of the last update on 2013-04-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.