Richard Greyson, MD
NPI 1356355770 · Internal Medicine Physician · Oklahoma City, OK
Richard Greyson, MD is a Internal Medicine Physician provider in Oklahoma City, OK (NPI 1356355770).
Provider details
- NPI number
- 1356355770
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 10537 (OK)
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
19 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
174 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 | 174 | $106 |
Typical Medicare-allowed amounts for these services range $106–$106 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 45 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 99 | 52 |
| Ezetimibe | 74 | 39 |
| Hydrochlorothiazide | 64 | 34 |
| Losartan Potassium | 63 | 28 |
| Lisinopril | 62 | 29 |
| Levothyroxine Sodium | 53 | 27 |
| Rosuvastatin Calcium | 47 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-28
- Last updated
- 2010-07-01
Frequently asked questions
- What is Richard Greyson's NPI number?
- Richard Greyson's National Provider Identifier (NPI) is 1356355770, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Richard Greyson's specialty?
- Richard Greyson is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Richard Greyson located?
- Richard Greyson's practice location on file with NPPES is 1110 N Classen Blvd, Oklahoma City, OK 73106.
- What is Richard Greyson's phone number?
- The practice phone number listed in the NPPES registry for Richard Greyson is (405) 232-2702.
- Is Richard Greyson's NPI active?
- Yes — Richard Greyson's NPI (1356355770) is active in the NPPES registry as of the last update on 2010-07-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.