1. Home
  2. Directory
  3. New York
  4. New York New York
  5. Internal Medicine
  6. NPI Profile

DR. RON S GEJMAN MD, PHD
NPI 1811523848
Internal Medicine - Medical Oncology in New York, NY

Active since March 21, 2020PECOS Enrolled
177 FORT WASHINGTON AVE, MHB 6GN-435, NEW YORK, NY 10032(212) 305-8923 Get Directions Write a Review

NPPES record last updated: April 30, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Apr 30, 2026, Mar 27, 2026, Jul 7, 2023 and 1 more (4 updates tracked since 2020).

About Dr. Ron S Gejman Md, Phd NPPES

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

DR. RON S GEJMAN MD, PHD (NPI 1811523848) is an individual medical oncology provider in New York, New York, licensed in New York (323560) and active in the NPI registry since March 2020. He is enrolled in Medicare PECOS and is a graduate of Other (2020).

NPPES Registry Identity

NPI1811523848
Entity TypeIndividualMale
Primary Taxonomy207RX0202X
Provider Legal NameDR. RON S GEJMANCredential: MD, PHD
Location Address177 FORT WASHINGTON AVE, MHB 6GN-435New York, NY 10032-3733
Mailing Address177 Fort Washington Ave, Mhb 6gn-435New York, NY 10032 · (212) 305-8923
Phone(212) 305-8923
Sole ProprietorYes
Medical School CMSOtherGraduated 2020
Enumeration DateMarch 21, 2020
Last NPPES UpdateApril 30, 20264 updates tracked since enumeration
NPPES CertifiedApril 30, 2026
✔ NPI 1811523848 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Medical OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RX0202X
License✔ Licensed in NY · 323560
Definition
An internist who specializes in the diagnosis and treatment of all types of cancer and other benign and malignant tumors. This specialist decides on and administers therapy for these malignancies as well as consults with surgeons and radiotherapists on other treatments for cancer.
Also ListedInternal MedicineTaxonomy 207R00000X · License 323560 (NY)
177 FORT WASHINGTON AVE, New York, NY 10032
Open in Google Maps ↗

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Ron S Gejman Md, Phd is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID1456764166
PECOS Enrollment IDI20260501003619
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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 10032 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
$198.19 typical visit price
range $65.69 – $198.19
Typical copayment $49.54 (range $16.42 – $49.54)
Most-billed visit code 99205
Established Patient
$114.88 typical visit price
range $21.20 – $160.66
Typical copayment $28.72 (range $5.30 – $40.16)
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.

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.

SHADY AHMED PT, DPT
Physical Therapist
177 FORT WASHINGTON AVE
NEW YORK, NY 10032
New York County (212) 305-3280
BRIGGITTE PAOLA ALCIVAR FNP
Nurse Practitioner (Family)
177 FORT WASHINGTON AVE
NEW YORK, NY 10032
New York County (347) 215-1922
MRS. CLAUDIA ANN GHIGLIOTTY OTR
Occupational Therapist
177 FORT WASHINGTON AVE, 8 GARDEN NORTH
NEW YORK, NY 10032
New York County (212) 305-8352
BRITTANY SHINN MS OTR/L
Occupational Therapist
177 FORT WASHINGTON AVE
NEW YORK, NY 10032
New York County (212) 305-8352
NATASHA LOUISA COLEMAN
Surgery (Surgical Critical Care)
177 FORT WASHINGTON AVE
NEW YORK, NY 10032
New York County (212) 305-5970
KIMBERLY BUKOSKI PA-C
Physician Assistant
177 FORT WASHINGTON AVE
NEW YORK, NY 10032
New York County (203) 218-4748
ANDREW ANZALONE
Student in an Organized Health Care Education/Training Program
177 FORT WASHINGTON AVE, INTERNAL MEDICINE RESIDENCY OFFICE, FLOOR 6, CENTER 12
NEW YORK, NY 10032
New York County (212) 305-6262
DANIELLE NICOLE CRUZ PHYSICIAN ASSISTANT
Physician Assistant
177 FORT WASHINGTON AVE
NEW YORK, NY 10032
New York County (212) 305-2500

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 Ron Gejman's NPI number?

The NPI number for Ron Gejman is 1811523848. It was assigned to this individual provider in the NPPES registry on March 21, 2020.

Where is Ron Gejman located?

Ron Gejman practices at 177 Fort Washington Ave Mhb 6gn-435, New York, NY 10032. The listed phone number is (212) 305-8923.

What is Ron Gejman's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.

Is Ron Gejman enrolled in Medicare?

Yes. Ron Gejman is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Ron Gejman was last updated on April 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.