Seema Sangwan, M.D.
NPI 1952370900 · Internal Medicine Physician · Sunnyvale, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Seema Sangwan, M.D. is a Internal Medicine Physician provider in Sunnyvale, CA (NPI 1952370900).
Provider details
- NPI number
- 1952370900
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- A78098 (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
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
474 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 164 | $110 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 152 | $154 |
| Telephone Medical Discussion With Physician, 5-10 Minutes99441 | 60 | $68 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 34 | $156 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 27 | $105 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 31 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 81 | 29 |
| Amlodipine Besylate | 68 | 21 |
| Rosuvastatin Calcium | 65 | 19 |
| Losartan Potassium | 60 | 18 |
| Levothyroxine Sodium | 59 | 19 |
| Metformin Hclbrand: Metformin Hcl Er | 31 | 14 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$164 across 8 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
- 2006-03-14
- Last updated
- 2016-02-24
Frequently asked questions
- What is Seema Sangwan's NPI number?
- Seema Sangwan's National Provider Identifier (NPI) is 1952370900, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Seema Sangwan's specialty?
- Seema Sangwan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Seema Sangwan located?
- Seema Sangwan's practice location on file with NPPES is 877 W Fremont Ave, Sunnyvale, CA 94087-2315.
- What is Seema Sangwan's phone number?
- The practice phone number listed in the NPPES registry for Seema Sangwan is (408) 900-8077.
- Does Seema Sangwan accept Medicare?
- Seema Sangwan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Seema Sangwan's NPI active?
- Yes — Seema Sangwan's NPI (1952370900) is active in the NPPES registry as of the last update on 2016-02-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.