Gregory Robertson, M.D.
NPI 1932281011 · Internal Medicine Physician · Newport Beach, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Robertson, M.D. is a Internal Medicine Physician provider in Newport Beach, CA (NPI 1932281011).
Provider details
- NPI number
- 1932281011
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- G50555 (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
19 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
3,456 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 624 | $138 |
| 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 | 527 | $17 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 492 | $9 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 356 | $98 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 231 | $16 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 102 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Rosuvastatin Calcium | 242 | 74 |
| Levothyroxine Sodium | 231 | 59 |
| Irbesartan | 144 | 53 |
| Pantoprazole Sodium | 126 | 43 |
| Tirzepatidebrand: Mounjaro | 125 | 17 |
| Alprazolam | 109 | 25 |
| Semaglutide |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$3,072 across 126 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
- 2006-10-19
- Last updated
- 2008-08-04
Frequently asked questions
- What is Gregory Robertson's NPI number?
- Gregory Robertson's National Provider Identifier (NPI) is 1932281011, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Robertson's specialty?
- Gregory Robertson is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Robertson located?
- Gregory Robertson's practice location on file with NPPES is 20311 Sw Acacia St, Newport Beach, CA 92660-1733.
- What is Gregory Robertson's phone number?
- The practice phone number listed in the NPPES registry for Gregory Robertson is (949) 250-4244.
- Does Gregory Robertson accept Medicare?
- Gregory Robertson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Robertson's NPI active?
- Yes — Gregory Robertson's NPI (1932281011) is active in the NPPES registry as of the last update on 2008-08-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.