Shunpei Iwata, M.D.
NPI 1396931309 · Internal Medicine Physician · Pasadena, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Shunpei Iwata, M.D. is a Internal Medicine Physician provider in Pasadena, CA (NPI 1396931309).
Provider details
- NPI number
- 1396931309
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A95845 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
18 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,275 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 663 | $139 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 190 | $89 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 185 | $140 |
| Annual Depression Screening, 5 to 15 MinutesG0444 | 169 | $21 |
| Administration of Influenza Virus VaccineG0008 | 26 | $29 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 24 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 56 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 356 | 101 |
| Losartan Potassium | 301 | 87 |
| Amlodipine Besylate | 233 | 67 |
| Rosuvastatin Calcium | 182 | 62 |
| Metformin Hcl | 176 | 44 |
| Simvastatin | 173 | 47 |
| Alendronate Sodium | 146 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-09-24
- Last updated
- 2021-08-27
- Certified
- 2021-08-27
Frequently asked questions
- What is Shunpei Iwata's NPI number?
- Shunpei Iwata's National Provider Identifier (NPI) is 1396931309, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Shunpei Iwata's specialty?
- Shunpei Iwata is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Shunpei Iwata located?
- Shunpei Iwata's practice location on file with NPPES is 800 Fairmount Ave Ste 410, Pasadena, CA 91105-3154.
- What is Shunpei Iwata's phone number?
- The practice phone number listed in the NPPES registry for Shunpei Iwata is (626) 535-0900.
- Does Shunpei Iwata accept Medicare?
- Shunpei Iwata is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Shunpei Iwata's NPI active?
- Yes — Shunpei Iwata's NPI (1396931309) is active in the NPPES registry as of the last update on 2021-08-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.