Christopher Irwin, M.D
NPI 1033506191 · Internal Medicine Physician · Fort Sam Houston, TX
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Christopher Irwin, M.D is a Internal Medicine Physician provider in Fort Sam Houston, TX (NPI 1033506191).
Provider details
- NPI number
- 1033506191
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D
- Sex
- Male
- Sole proprietor
- No
- License
- 32890 (WV)
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 tenure28% of score
11 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
141 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 94 | $75 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 32 | $76 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 15 | $125 |
Typical Medicare-allowed amounts for these services range $75–$125 (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.
Practice location
Mailing address
Additional practice locations (1)
- 1320 Maplewood AveRonceverte, WV 24970-8016Phone: (304) 647-4411
Registry dates
- Enumerated
- 2015-04-16
- Last updated
- 2023-11-07
- Certified
- 2023-11-07
Frequently asked questions
- What is Christopher Irwin's NPI number?
- Christopher Irwin's National Provider Identifier (NPI) is 1033506191, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Christopher Irwin's specialty?
- Christopher Irwin is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Christopher Irwin located?
- Christopher Irwin's practice location on file with NPPES is 3551 Roger Brooke Dr, Fort Sam Houston, TX 78234-4504.
- What is Christopher Irwin's phone number?
- The practice phone number listed in the NPPES registry for Christopher Irwin is (916) 210-2338.
- Does Christopher Irwin accept Medicare?
- Christopher Irwin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Christopher Irwin's NPI active?
- Yes — Christopher Irwin's NPI (1033506191) is active in the NPPES registry as of the last update on 2023-11-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.