John Nienow, MD
NPI 1861472649 · Infectious Disease Physician · San Francisco, CA
John Nienow, MD is a Infectious Disease Physician provider in San Francisco, CA (NPI 1861472649).
Provider details
- NPI number
- 1861472649
- Entity type
- Individual
- Primary specialty
- Infectious Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 00G795490 (CA)
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
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,038 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) |
|---|---|---|
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 341 | $19 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 332 | $153 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 271 | $214 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 41 | $108 |
| Annual Wellness Visit; Includes a Personalized Prevention Plan of Service (pps), Initial VisitG0438 | 19 | $194 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 181 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Bictegrav/Emtricit/Tenofov Alabrand: Biktarvy | 680 | 79 |
| Atorvastatin Calcium | 603 | 140 |
| Bupropion Hclbrand: Bupropion Xl | 270 | 50 |
| Tamsulosin Hcl | 252 | 68 |
| Gabapentin | 250 | 47 |
| Emtricitabine/Tenofov Alafenambrand: Descovy | 224 | 23 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$6,532 across 81 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
Additional practice locations (1)
- 558 Clayton StPssb G500San Francisco, CA 94117-2907Phone: (415) 746-1950Fax: (415) 431-9909
Registry dates
- Enumerated
- 2006-01-18
- Last updated
- 2025-05-06
- Certified
- 2025-05-06
Frequently asked questions
- What is John Nienow's NPI number?
- John Nienow's National Provider Identifier (NPI) is 1861472649, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Nienow's specialty?
- John Nienow is listed in the NPPES registry with a primary specialty of Infectious Disease Physician (Allopathic & Osteopathic Physicians).
- Where is John Nienow located?
- John Nienow's practice location on file with NPPES is 2186 Geary Blvd Ste 314, San Francisco, CA 94115-3457.
- What is John Nienow's phone number?
- The practice phone number listed in the NPPES registry for John Nienow is (415) 202-1550.
- Is John Nienow's NPI active?
- Yes — John Nienow's NPI (1861472649) is active in the NPPES registry as of the last update on 2025-05-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.