Gregg Workman, MD
NPI 1447223516 · Family Medicine Physician · Brenham, TX
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregg Workman, MD is a Family Medicine Physician provider in Brenham, TX (NPI 1447223516).
Provider details
- NPI number
- 1447223516
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- H66161 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
238 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 119 | $79 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 45 | $131 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 32 | $115 |
| Automated Urinalysis Test81003 | 30 | $2 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 12 | $81 |
Typical Medicare-allowed amounts for these services range $2–$131 (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 · 93 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Lisinopril | 186 | 41 |
| Levothyroxine Sodium | 184 | 43 |
| Simvastatin | 180 | 48 |
| Losartan Potassium | 169 | 37 |
| Atorvastatin Calcium | 163 | 52 |
| Amlodipine Besylate | 128 | 33 |
| Pantoprazole Sodium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$68 across 4 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
- 2006-02-09
- Last updated
- 2023-12-07
- Certified
- 2023-12-07
Frequently asked questions
- What is Gregg Workman's NPI number?
- Gregg Workman's National Provider Identifier (NPI) is 1447223516, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregg Workman's specialty?
- Gregg Workman is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gregg Workman located?
- Gregg Workman's practice location on file with NPPES is 601 Medical Parkway, Brenham, TX 77833-5430.
- What is Gregg Workman's phone number?
- The practice phone number listed in the NPPES registry for Gregg Workman is (979) 836-2822.
- Does Gregg Workman accept Medicare?
- Gregg Workman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregg Workman's NPI active?
- Yes — Gregg Workman's NPI (1447223516) is active in the NPPES registry as of the last update on 2023-12-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.