DR. GEORGE KUNNACKAL JOHN M.D., MSC
NPI 1639432834
Internal Medicine - Gastroenterology in Baltimore, MD

Q: What is George Kunnackal John's NPI number?

The NPI number for George Kunnackal John is 1639432834. It was assigned to this individual provider in the NPPES registry on June 21, 2012.

Q: What is George Kunnackal John's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Active since June 21, 2012PECOS EnrolledAccepts Medicare Assignment

86.67/100

CMS Quality Rating

22 S GREENE ST, BALTIMORE, MD 21201(410) 328-5780(410) 328-8315 Get Directions Write a Review

NPPES record last updated: June 30, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jun 30, 2025, May 13, 2019 (2 updates tracked since 2019).

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About Dr. George Kunnackal John M.d., Msc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. GEORGE KUNNACKAL JOHN M.D., MSC (NPI 1639432834) is an individual gastroenterology provider in Baltimore, Maryland, licensed in Maryland (D84345) and active in the NPI registry since June 2012. He is enrolled in Medicare PECOS, is affiliated with University Of Maryland Medical Center, and maintains 7 additional practice locations.

NPPES Registry Identity

NPI1639432834

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameDR. GEORGE KUNNACKAL JOHNCredential: M.D., MSC

Location Address22 S GREENE STBaltimore, MD 21201-1544

Mailing Address920 Elkridge Landing RdLinthicum, MD 21090-2917 · (443) 462-5010 · Fax (410) 684-2031

Phone(410) 328-5780

Fax(410) 328-8315

Sole ProprietorNo

Medical School CMSOtherGraduated 2010

Enumeration DateJune 21, 2012

Last NPPES UpdateJune 30, 20252 updates tracked since enumeration

NPPES CertifiedJune 30, 2025

✔ NPI 1639432834 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

License✔ Licensed in MD · D84345

Definition

An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.

Also ListedInternal MedicineTaxonomy 207R00000X · License D84345 (MD)

22 S GREENE ST, Baltimore, MD 21201

Open in Google Maps ↗

Secondary Practice Locations 7

Location 1100 West Rd Ste 115Towson, MD 21204-2358 · Phone (410) 494-0144 · Fax (410) 494-0147

Location 2700 Geipe RdCatonsville, MD 21228-4147 · Phone (410) 753-2255 · Fax (410) 242-4404

Location 37625 Maple Lawn Blvd Ste 110Fulton, MD 20759-2565 · Phone (301) 490-5025 · Fax (301) 490-5260

Location 4515 S Tollgate Rd Ste 100Bel Air, MD 21014-5251 · Phone (443) 643-3050 · Fax (443) 643-1692

Location 55890 Waterloo RdColumbia, MD 21045-2617 · Phone (667) 214-2100 · Fax (410) 799-9097

Location 6827 Linden AveBaltimore, MD 21201-4606 · Phone (410) 328-8730 · Fax (410) 328-8315

Location 7800 Linden Ave Fl 9Baltimore, MD 21201-4622 · Phone (410) 552-2539 · Fax (410) 255-8415

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. George Kunnackal John M.d., Msc is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID2860642501

PECOS Enrollment IDI20180829001435

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show George Kunnackal John reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

University Of Maryland Physicians PA

Same address

Pulmonary Disease

22 S GREENE ST
Baltimore, MD 21201

Reassigned Medicare billing, Maryland enrollment
614 clinicians in this Medicare group

NPI 1144270687 (410) 328-8040

University Of Maryland Community Medical Group, Inc.

0.6 mi

Family Medicine

821 N EUTAW ST
Baltimore, MD 21201

Reassigned Medicare billing, Maryland enrollment
966 clinicians in this Medicare group

NPI 1477530624 (443) 552-2900

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 16

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Biopsy of large bowel using a flexible endoscope 45380

A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.

256 services255 patients

Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239

This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.

222 services219 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

196 services163 patients

Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385

This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.

160 services159 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

61 services60 patients

Telephone medical discussion with physician, 21-30 minutes 99443

This service involves a 21-30 minute phone conversation with a physician. It's a chance for you to discuss your health concerns, symptoms or treatment plans. It's similar to an in-person consultation, but conducted over the phone for your convenience and safety.

52 services47 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

41 services39 patients

Colorectal cancer screening; colonoscopy on individual at high risk G0105

Colorectal cancer screening, specifically a colonoscopy, is a preventive measure for those at high risk. A thin, flexible tube with a camera inspects the colon to spot any abnormal growths. This test helps detect potential issues early, enhancing the effectiveness of treatment.

36 services35 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

25 services22 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

24 services24 patients

Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm 43249

This procedure involves using a flexible tube with a camera, called an endoscope, to gently expand narrowed areas in your esophagus, stomach, or upper small bowel. A small balloon is inflated, making it easier for food and liquid to pass through. It's safe and effective.

23 services23 patients

Diagnostic exam of large bowel using a flexible endoscope 45378

This procedure, known as a colonoscopy, involves using a flexible tube with a light and camera to examine the large intestine. It helps detect any abnormalities such as polyps or inflammation. It's a standard procedure to ensure gut health.

20 services19 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

20 services20 patients

Control of bleeding of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43255

This procedure involves using a flexible tube with a light, called an endoscope, to examine and treat bleeding in the esophagus, stomach, or upper small bowel. It's a safe, effective way to control bleeding and ensure your digestive health.

17 services17 patients

Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43235

This procedure, known as an upper endoscopy, involves inserting a thin, flexible tube with a camera down the throat to examine the esophagus, stomach, and upper small bowel. It helps diagnose conditions like ulcers or inflammation.

14 services14 patients

Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes 99221

Initial hospital inpatient care refers to the first day of your stay in the hospital. This service typically includes a 30-minute check-up with a healthcare professional. They'll assess your health, discuss your condition, and plan your treatment. It's part of ensuring you receive the best possible care.

11 services11 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

University Of Maryland Medical Center

Acute Care Hospitals · Baltimore, MD

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number210002

Location22 South Greene StreetBaltimore, MD 21201 · Baltimore City County

Emergency services Birthing friendly

University Of MD Medical Center Midtown Campus

Acute Care Hospitals · Baltimore, MD

3/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number210038

Location827 Linden AvenueBaltimore, MD 21201 · Baltimore City County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 21201 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$139.05 typical visit price

range $60.73 – $183.44

Typical copayment $34.76 (range $15.18 – $45.86)

Most-billed visit code 99204

Established Patient

$106.59 typical visit price

range $19.60 – $149.17

Typical copayment $26.64 (range $4.90 – $37.29)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

86.67/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

90.03

Promoting Interoperability

100

Improvement Activities

Cost

65.53

Referred Medical Equipment & Supplies CMS DME claims 3

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Enteral feeding supply kit; pump fed, per day, includes but not limited to feeding/flushing syringe, administration set tubing, dressings, tape B4035

Other-Enteral and Parenteral · category OB006N

1 supplier12 claims360 services$7.65 avg. paid by Medicare

Enteral formula, nutritionally complete, calorically dense (equal to or greater than 1.5 kcal/ml) with intact nutrients, includes proteins, fats, carbohydrates, vitamins and minerals, may include fiber, administered through an enteral feeding tube, 100 calories = 1 unit B4152

Other-Enteral and Parenteral · category OB006N

1 supplier12 claims5,400 services$0.39 avg. paid by Medicare

Iv pole E0776

DME-Other DME · category DE000N

1 supplier12 claims12 services$11.53 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. LEONARD ANANG SOWAH M.D.

Internal Medicine

22 S GREENE ST
BALTIMORE, MD 21201

Baltimore City (410) 706-4619

VISHAL BHATNAGAR MD

Student in an Organized Health Care Education/Training Program

22 S GREENE ST, MEDICINE, N3E09
BALTIMORE, MD 21201

Baltimore City (410) 328-6110

NANCE J FOX P.A.-C

Physician Assistant (Medical)

22 S GREENE ST, G2K36
BALTIMORE, MD 21201

Baltimore City (410) 328-1170

HILARY TAMARA WOLF MD

Pediatrics (Adolescent Medicine)

22 S GREENE ST
BALTIMORE, MD 21201

Baltimore City (410) 328-7373

MS. LINDSAY BREAM O'MEARA CRNP

Nurse Practitioner (Acute Care)

22 S GREENE ST, SUITE S4D07
BALTIMORE, MD 21201

Baltimore City (410) 328-3365

NORA T OLIVER M.D., M.P.H.

Student in an Organized Health Care Education/Training Program

22 S GREENE ST, N3E09
BALTIMORE, MD 21201

Baltimore City (410) 328-5756

SHOSHANA JO WEINER

Internal Medicine

22 S GREENE ST
BALTIMORE, MD 21201

Baltimore City (617) 214-1332

JENNA VANLIERE CANZONIERO M.D.

Internal Medicine

22 S GREENE ST, N3E09
BALTIMORE, MD 21201

Baltimore City (410) 328-5756

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is George Kunnackal John's NPI number?

The NPI number for George Kunnackal John is 1639432834. It was assigned to this individual provider in the NPPES registry on June 21, 2012.

Where is George Kunnackal John located?

George Kunnackal John practices at 22 S Greene St, Baltimore, MD 21201. The listed phone number is (410) 328-5780.

What is George Kunnackal John's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is George Kunnackal John enrolled in Medicare?

Yes. George Kunnackal John is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for George Kunnackal John's services?

According to the CMS Revalidation Reassignment List (October 2026 release), George Kunnackal John reassigns Medicare benefits to 2 organizations: University Of Maryland Physicians PA (Baltimore, MD) and University Of Maryland Community Medical Group, Inc. (Baltimore, MD). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for George Kunnackal John's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is George Kunnackal John affiliated with any hospitals?

According to CMS data, George Kunnackal John is affiliated with University Of Maryland Medical Center and University Of MD Medical Center Midtown Campus.

When was this NPI record last updated?

The NPPES record for George Kunnackal John was last updated on June 30, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.