Melissa Chiang
NPI 1609339159 · Internal Medicine Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Melissa Chiang is a Internal Medicine Physician provider in San Francisco, CA (NPI 1609339159).
Provider details
- NPI number
- 1609339159
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Female
- Sole proprietor
- No
- License
- 036.165304 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
7 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
75 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 62 | $59 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 13 | $134 |
Typical Medicare-allowed amounts for these services range $59–$134 (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 · 86 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 641 | 246 |
| Amlodipine Besylate | 343 | 127 |
| Losartan Potassium | 185 | 73 |
| Metformin Hcl | 169 | 59 |
| Metoprolol Succinate | 154 | 58 |
| Gabapentin | 134 | 57 |
| Lisinopril |
Practice location
Mailing address
Additional practice locations (1)
- 1715 E 95th StChicago, IL 60617-4708Phone: (773) 768-4437Fax: (773) 564-3515
Registry dates
- Enumerated
- 2019-04-11
- Last updated
- 2025-08-20
- Certified
- 2025-08-20
Frequently asked questions
- What is Melissa Chiang's NPI number?
- Melissa Chiang's National Provider Identifier (NPI) is 1609339159, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Melissa Chiang's specialty?
- Melissa Chiang is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Melissa Chiang located?
- Melissa Chiang's practice location on file with NPPES is 1545 Divisadero St, San Francisco, CA 94143-3400.
- What is Melissa Chiang's phone number?
- The practice phone number listed in the NPPES registry for Melissa Chiang is (415) 353-7900.
- Does Melissa Chiang accept Medicare?
- Melissa Chiang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Melissa Chiang's NPI active?
- Yes — Melissa Chiang's NPI (1609339159) is active in the NPPES registry as of the last update on 2025-08-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.