Calvin Parker, M.D.
NPI 1073654976 · Internal Medicine Physician · Baltimore, MD
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Calvin Parker, M.D. is a Internal Medicine Physician provider in Baltimore, MD (NPI 1073654976).
Provider details
- NPI number
- 1073654976
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 057556 (GA)
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
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
950 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) |
|---|---|---|
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 281 | $173 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 111 | $133 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 93 | $80 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 84 | $102 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 79 | $133 |
| Biopsy of Large Bowel Using a Flexible Endoscope |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 159 | 51 |
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 103 | 101 |
| Dicyclomine Hcl | 26 | — |
| Linaclotidebrand: Linzess | 22 | — |
| Omeprazole | 15 | — |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 14 | 14 |
| Peg3350/Sod Sulf,bicarb,cl/Kcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,342 across 77 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
- 2007-02-12
- Last updated
- 2022-03-09
- Certified
- 2022-03-09
Frequently asked questions
- What is Calvin Parker's NPI number?
- Calvin Parker's National Provider Identifier (NPI) is 1073654976, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Calvin Parker's specialty?
- Calvin Parker is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Calvin Parker located?
- Calvin Parker's practice location on file with NPPES is 1838 Greene Tree Rd, Baltimore, MD 21208-6391.
- What is Calvin Parker's phone number?
- The practice phone number listed in the NPPES registry for Calvin Parker is (410) 602-7782.
- Does Calvin Parker accept Medicare?
- Calvin Parker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Calvin Parker's NPI active?
- Yes — Calvin Parker's NPI (1073654976) is active in the NPPES registry as of the last update on 2022-03-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.