Graham Parker
NPI 1770232639 · Internal Medicine Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Graham Parker is a Internal Medicine Physician provider in Los Angeles, CA (NPI 1770232639).
Provider details
- NPI number
- 1770232639
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- A188171 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
4 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 29 | 15 |
| Amlodipine Besylate | 22 | — |
| Gabapentin | 21 | 17 |
| Tamsulosin Hcl | 17 | — |
| Metformin Hcl | 13 | — |
| Finasteride | 13 | — |
| Diclofenac Sodium | 11 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$25 across 1 record (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
- 2022-03-19
- Last updated
- 2025-07-12
- Certified
- 2025-07-12
Frequently asked questions
- What is Graham Parker's NPI number?
- Graham Parker's National Provider Identifier (NPI) is 1770232639, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Graham Parker's specialty?
- Graham Parker is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Graham Parker located?
- Graham Parker's practice location on file with NPPES is 1200 N State St Ste A7d, Los Angeles, CA 90089-1001.
- What is Graham Parker's phone number?
- The practice phone number listed in the NPPES registry for Graham Parker is (323) 409-7556.
- Does Graham Parker accept Medicare?
- Graham Parker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Graham Parker's NPI active?
- Yes — Graham Parker's NPI (1770232639) is active in the NPPES registry as of the last update on 2025-07-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.