Gregory Constantine, MD
NPI 1881038107 · Internal Medicine Physician · Bethesda, MD
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Constantine, MD is a Internal Medicine Physician provider in Bethesda, MD (NPI 1881038107).
Provider details
- NPI number
- 1881038107
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- MD045198 (DC)
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
13 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
131 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 50 Minutes99233 | 104 | $133 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 27 | $197 |
Typical Medicare-allowed amounts for these services range $133–$197 (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)
- One Baylor PlazaDept of Internal Medicine Room 022dHouston, TX 77030Phone: (713) 798-5585
Registry dates
- Enumerated
- 2013-04-18
- Last updated
- 2019-07-11
Frequently asked questions
- What is Gregory Constantine's NPI number?
- Gregory Constantine's National Provider Identifier (NPI) is 1881038107, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Constantine's specialty?
- Gregory Constantine is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Constantine located?
- Gregory Constantine's practice location on file with NPPES is 10 Center Drive, Bethesda, MD 20814.
- What is Gregory Constantine's phone number?
- The practice phone number listed in the NPPES registry for Gregory Constantine is (301) 761-7966.
- Does Gregory Constantine accept Medicare?
- Gregory Constantine is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Constantine's NPI active?
- Yes — Gregory Constantine's NPI (1881038107) is active in the NPPES registry as of the last update on 2019-07-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.