George Kunnackal John, M.D., MSC
NPI 1639432834 · Gastroenterology Physician · Baltimore, MD
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
George Kunnackal John, M.D., MSC is a Gastroenterology Physician provider in Baltimore, MD (NPI 1639432834).
Provider details
- NPI number
- 1639432834
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D., MSC
- Sex
- Male
- Sole proprietor
- No
- License
- D84345 (MD)
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
14 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
8 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,178 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) |
|---|---|---|
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 256 | $121 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 222 | $86 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 196 | $127 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 160 | $244 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 61 | $128 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 22 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 487 | 206 |
| Famotidine | 469 | 176 |
| Omeprazole | 116 | 35 |
| Sucralfate | 76 | 39 |
| Colestipol Hcl | 60 | 25 |
| Linaclotidebrand: Linzess | 47 | 14 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-C | 44 | 43 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,248 across 44 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
Additional practice locations (7)
- 827 Linden AveBaltimore, MD 21201-4606Phone: (410) 328-8730Fax: (410) 328-8315
- 800 Linden Ave Fl 9Baltimore, MD 21201-4622Phone: (410) 552-2539Fax: (410) 255-8415
- 515 S Tollgate Rd Ste 100Bel Air, MD 21014-5251Phone: (443) 643-3050Fax: (443) 643-1692
- 700 Geipe RdCatonsville, MD 21228-4147Phone: (410) 753-2255Fax: (410) 242-4404
- 5890 Waterloo RdColumbia, MD 21045-2617Phone: (667) 214-2100Fax: (410) 799-9097
- 7625 Maple Lawn Blvd Ste 110Fulton, MD 20759-2565Phone: (301) 490-5025Fax: (301) 490-5260
- 100 West Rd Ste 115Towson, MD 21204-2358Phone: (410) 494-0144Fax: (410) 494-0147
Registry dates
- Enumerated
- 2012-06-21
- Last updated
- 2025-06-30
- Certified
- 2025-06-30
Frequently asked questions
- What is George Kunnackal John's NPI number?
- George Kunnackal John's National Provider Identifier (NPI) is 1639432834, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is George Kunnackal John's specialty?
- George Kunnackal John is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is George Kunnackal John located?
- George Kunnackal John's practice location on file with NPPES is 22 S Greene St, Baltimore, MD 21201-1544.
- What is George Kunnackal John's phone number?
- The practice phone number listed in the NPPES registry for George Kunnackal John is (410) 328-5780.
- Does George Kunnackal John accept Medicare?
- George Kunnackal John is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is George Kunnackal John's NPI active?
- Yes — George Kunnackal John's NPI (1639432834) is active in the NPPES registry as of the last update on 2025-06-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.