Active NPI 1013100759 Individual Practitioner Male Practitioner

Dr. John A Gelzhiser , MD

Internal Medicine • Warwick, RI

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. John Gelzhiser, MD is a certified Internal Medicine practicing in Warwick, RI. With approximately 22 years of clinical experience since completing medical education in 2004, Dr. Gelzhiser delivers high-quality medical care to the local community at 455 TOLL GATE RD.

Dr. Gelzhiser is affiliated with Affinity Physicians Llc. and accepts Medicare assignment.

Frequently performed procedures and clinical services include subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least, initial nursing facility visit, initial nursing facility care with moderate level of medical decision making, per day, if using time, at least. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

455 Toll Gate Rd

Warwick, RI 028862759

Telephone 4017377000

Fax 4017364265

Associated Practice Facility / Clinic

🏢 Kent County Memorial Hospital Facility NPI 1386643294

Medicare Profile & Education

Medical School

Other

Graduation Year

2004

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine in Warwick, RI

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

22 Yrs +4.2 yrs vs City Avg

City Avg: 17.8 Yrs

State Avg: 27.9 Yrs

Regional Practice Density

121 Specialists

Practicing in Warwick, RI (1079 Statewide)

Telehealth Adoption Rate

10.7% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

52.8% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Gelzhiser (22 Years) 22 Yrs

Warwick Specialty Average (17.8 Years) 17.8 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2024)

Reporting Year:

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	283	124	$210.00	$107.28
99306 Initial nursing facility visit, typically 45 minutes per day	202	167	$381.00	$180.92
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	110	56	$210.00	$107.40
99306 Initial nursing facility visit, typically 45 minutes per day	109	88	$381.00	$178.38
99305 Initial nursing facility care with moderate level of medical decision making, per day, if using time, at least 35 minutes	43	41	$297.00	$132.47
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	29	21	$159.00	$74.31
99305 Initial nursing facility care with moderate level of medical decision making, per day, if using time, at least 35 minutes	13	13	$297.00	$132.66

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	285	118	$210.00	$107.59
99305 Initial nursing facility care with moderate level of medical decision making, per day, if using time, at least 35 minutes	156	136	$297.00	$134.88
99306 Initial nursing facility visit, typically 45 minutes per day	149	128	$381.00	$182.83
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	110	59	$210.00	$108.08
99305 Initial nursing facility care with moderate level of medical decision making, per day, if using time, at least 35 minutes	80	70	$297.00	$134.78
99306 Initial nursing facility visit, typically 45 minutes per day	72	66	$381.00	$183.89
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	63	47	$159.00	$75.37

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	377	158	$159.71	$70.32
99305 Initial nursing facility care with moderate level of medical decision making, per day, if using time, at least 35 minutes	302	246	$298.13	$130.74
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	242	104	$159.74	$69.99
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	203	109	$211.09	$92.51
99305 Initial nursing facility care with moderate level of medical decision making, per day, if using time, at least 35 minutes	175	157	$298.49	$130.18
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	86	45	$211.33	$92.54
99307 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 10 minutes	81	44	$101.33	$44.45
99307 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 10 minutes	51	31	$101.88	$44.57

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	422	150	$163.00	$71.59
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	308	118	$216.00	$94.40
99305 Initial nursing facility care with moderate level of medical decision making, per day, if using time, at least 35 minutes	198	168	$307.00	$134.02
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	103	44	$163.00	$71.59
99307 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 10 minutes	67	52	$104.00	$45.55
99305 Initial nursing facility care with moderate level of medical decision making, per day, if using time, at least 35 minutes	59	55	$307.00	$134.02
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	52	27	$216.00	$94.40
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	34	18	$172.00	$74.27
99307 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 10 minutes	27	21	$104.00	$45.55
99306 Initial nursing facility visit, typically 45 minutes per day	27	26	$394.00	$172.26
99306 Initial nursing facility visit, typically 45 minutes per day	19	18	$394.00	$172.26

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	147	81	$172.00	$75.57
99231 Follow-up hospital inpatient care per day, typically 15 minutes	42	23	$93.00	$41.15
99239 Hospital discharge day management, more than 30 minutes	38	38	$253.00	$111.94
99217 Hospital observation care on day of discharge	14	14	$173.00	$75.39

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	100	62	$171.90	$74.36
99239 Hospital discharge day management, more than 30 minutes	37	37	$252.89	$110.73
99217 Hospital observation care on day of discharge	14	14	$173.00	$75.50

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	105	57	$167.00	$75.38
99239 Hospital discharge day management, more than 30 minutes	40	39	$249.00	$111.73
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	40	23	$240.00	$106.23

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	97	57	$167.00	$73.94
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	30	22	$240.00	$106.89
99239 Hospital discharge day management, more than 30 minutes	29	29	$249.00	$110.39
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	14	14	$467.00	$207.75
99217 Hospital observation care on day of discharge	12	12	$169.00	$74.77

Medical Specialties & State Licenses

Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

State License RI PENDING

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID

PENDING (RI)

Hospital & Practice Group Affiliations

Affinity Physicians Llc.

455 Toll Gate Rd, Warwick, RI 028862759

Phone: 4017377010

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

40 Associated Practitioners

Dr. Sterling Malish , MD

Internal Medicine

NPI 1003073776

Doctor of Medicine (M.D.)

Sabrina O'donnell , FNP-BC

Nurse Practitioner - Family

NPI 1003422775

Family Nurse Practitioner (Board Certified)

Maureen Mccourt

Nurse Practitioner - Pediatrics

NPI 1053589796

Cameron Fletcher , PA

Physician Assistant

NPI 1063088730

Physician Assistant

Nicole Barton , PA-C

Physician Assistant

NPI 1063746592

Physician Assistant (Certified)

Dr. Ashley Morrison , MD

Family Medicine

NPI 1063859270

Doctor of Medicine (M.D.)

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

6 Historical Events

✅

NPI Profile Active August 27, 2007

NPI status registered as active in NPPES database

📍

Updated Practice Location August 27, 2007

Registered at 455 TOLL GATE RD, WARWICK, RI 028862759 (Tel: 4017377000)

📍

Updated Business Mailing Address August 27, 2007

Registered at 455 TOLL GATE RD, WARWICK, RI 028862759 (Tel: 4017377000)

👤

Provider Name / Credentials Updated August 27, 2007

Recorded as JOHN GELZHISER, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) August 27, 2007

Internal Medicine (License #PENDING in RI)

🟢

Initial NPI Registration & Enumeration August 27, 2007

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1013100759

Entity Type:

Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)

Enumeration Date: August 27, 2007

Last Update: August 27, 2007

Sole Proprietor: No

Update or Correct Profile

Mailing Address

455 Toll Gate Rd

Warwick, RI 028862759

Phone: 4017377000

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).

⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.