Doctor profile · Federal record
Dr. George Kunnackal John, M.D., MSC
Gastroenterology Physician (CMS: Internal Medicine) · Internal Medicine Physician · Baltimore, MD
- NPI 1639432834
- Accepts Medicare
- MIPS 86.7 / 100 · 2023
- 16 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 8 locations across 1 states.
- Primary practice
-
22 S Greene St
Baltimore, MD 212011544
(410) 328-5780
fax (410) 328-8315 - Mailing address
-
920 Elkridge Landing RD
Linthicum, MD 210902917
Maryland — 7 locations
- Additional location
-
100 West RD Ste 115
Towson, MD 212042358
(410) 494-0144
fax (410) 494-0147 - Additional location
-
515 S Tollgate RD Ste 100
Bel Air, MD 210145251
(443) 643-3050
fax (443) 643-1692 - Additional location
-
5890 Waterloo RD
Columbia, MD 210452617
(667) 214-2100
fax (410) 799-9097 - Additional location
-
700 Geipe RD
Catonsville, MD 212284147
(410) 753-2255
fax (410) 242-4404 - Additional location
-
7625 Maple Lawn Blvd Ste 110
Fulton, MD 207592565
(301) 490-5025
fax (301) 490-5260 - Additional location
-
800 Linden Ave Fl 9
Baltimore, MD 212014622
(410) 552-2539
fax (410) 255-8415 - Additional location
-
827 Linden Ave
Baltimore, MD 212014606
(410) 328-8730
Credentials & registration
- NPI registered
- June 2012 — 14 yrs on file
- Profile last updated
- June 30, 2025
- Year of graduation
- 2010 — 16 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- Maryland #D84345
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1639432834. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,335
Distinct HCPCS
10
Medicare allowed
$194,249
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 262 | 206 | $131 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 210 | 210 | $125 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 170 | 168 | $95 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 149 | 149 | $252 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 109 | 104 | $132 | |
99443 |
Telephone medical discussion with physician, 21-30 minutes | 85 | 67 | $130 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 54 | 50 | $92 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 46 | 38 | $81 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 41 | 41 | $171 | |
G0105 |
Colorectal cancer screening; colonoscopy on individual at high risk | 37 | 37 | $184 |
In context: peer comparison
Among 49 peers in Baltimore Gastroenterology Physician, average services per provider: 49. This provider delivers 27× the peer median.Open Payments
Industry payments received
All-time total
$1,248
Transactions
44
Manufacturers
12
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Abbvie INC. | 9 | $354.43 | |
| Ardelyx, INC. | 3 | $159.25 | |
| Janssen Biotech, INC. | 7 | $133.54 | |
| Takeda Pharmaceuticals U.S.A., INC. | 7 | $118.66 | |
| Intercept Pharmaceuticals, INC. | 2 | $90.02 | |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | 4 | $74.06 | |
| Ferring Pharmaceuticals INC. | 1 | $66.15 | |
| Qol Medical, LLC | 2 | $64.51 | |
| Pfizer INC. | 3 | $54.11 | |
| Regeneron Healthcare Solutions, INC. | 2 | $48.53 | |
| Gilead Sciences, INC. | 2 | $43.65 | |
| Genzyme Corporation | 2 | $41.09 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,488
Patients
600
Total drug cost
$92,559
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Pantoprazole Sodium | Generic | 502 | 193 | $11,489 |
| Famotidine | Generic | 441 | 169 | $13,473 |
| Omeprazole | Generic | 123 | 44 | $3,182 |
| Sucralfate | Generic | 81 | 40 | $5,417 |
| Sod Sulf-Potass Sulf-Mag Sulf (Sodium, Potassium,Mag Sulfates) | Brand | 52 | 52 | $4,080 |
| Colestipol Hcl | Generic | 40 | 19 | $4,773 |
| Linzess (Linaclotide) | Brand | 40 | 12 | $32,315 |
| Gavilyte-C (Peg3350/Sod Sulf,Bicarb,Cl/Kcl) | Brand | 36 | 34 | $676 |
| Metoclopramide Hcl | Generic | 35 | 14 | $215 |
| Hyoscyamine Sulfate | Generic | 28 | 0 | $975 |
Hospital affiliations
Frequently asked questions
What is Dr. George Kunnackal John's medical specialty?
Dr. George Kunnackal John practices Gastroenterology Physician in Baltimore, MD.
Where does Dr. George Kunnackal John practice?
Dr. George Kunnackal John practices at 22 S Greene St, Baltimore, MD 212011544. Office phone: 4103285780.
What is Dr. George Kunnackal John's NPI?
Dr. George Kunnackal John's National Provider Identifier (NPI) is 1639432834, issued by NPPES.
Does Dr. George Kunnackal John accept Medicare assignment?
Yes. Dr. George Kunnackal John accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. George Kunnackal John commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Biopsy of large bowel using a flexible endoscope (HCPCS 45380); Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (HCPCS 43239). Source: CMS Medicare Physician & Other Practitioners file.