Harlan South, MD
NPI 1750438099 · Internal Medicine Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Harlan South, MD is a Internal Medicine Physician provider in San Francisco, CA (NPI 1750438099).
Provider details
- NPI number
- 1750438099
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- C141433 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Trazodone Hcl | 32 |
| Atorvastatin Calcium | 21 |
| Divalproex Sodium | 17 |
| Carvedilol | 16 |
| Quetiapine Fumarate | 15 |
| Sertraline Hcl | 14 |
| Levothyroxine Sodium | 12 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-05
- Last updated
- 2026-05-06
- Certified
- 2026-05-06
Frequently asked questions
- What is Harlan South's NPI number?
- Harlan South's National Provider Identifier (NPI) is 1750438099, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Harlan South's specialty?
- Harlan South is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Harlan South located?
- Harlan South's practice location on file with NPPES is 490 Post St Ste 914, San Francisco, CA 94102-1410.
- What is Harlan South's phone number?
- The practice phone number listed in the NPPES registry for Harlan South is (415) 316-5510.
- Does Harlan South accept Medicare?
- Harlan South is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Harlan South's NPI active?
- Yes — Harlan South's NPI (1750438099) is active in the NPPES registry as of the last update on 2026-05-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.