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AJAY PAL SINGH M.D.
NPI 1629451026
Internal Medicine - Gastroenterology in Norwalk, CT

Active since July 02, 2015PECOS EnrolledAccepts Medicare Assignment
40 CROSS ST, NORWALK, CT 06851(507) 284-2511 Get Directions Write a Review

NPPES record last updated: May 13, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: May 13, 2025, Jan 8, 2025, Dec 18, 2024 and 2 more (5 updates tracked since 2021).

About Ajay Pal Singh M.d. NPPES

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

AJAY PAL SINGH M.D. (NPI 1629451026) is an individual gastroenterology provider in Norwalk, Connecticut, licensed in Connecticut (79826) and active in the NPI registry since July 2015. He is enrolled in Medicare PECOS and is a graduate of Other (2014).

NPPES Registry Identity

NPI1629451026
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameAJAY PAL SINGHCredential: M.D.
Location Address40 CROSS STNorwalk, CT 06851-4647
Mailing Address40 Cross StNorwalk, CT 06851-4647 · (203) 852-2278
Phone(507) 284-2511
Sole ProprietorNo
Medical School CMSOtherGraduated 2014
Enumeration DateJuly 2, 2015
Last NPPES UpdateMay 13, 20255 updates tracked since enumeration
NPPES CertifiedMay 13, 2025
✔ NPI 1629451026 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
Licenses✔ Licensed in CT · 79826✔ Licensed in MN · 68428
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 ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
40 CROSS ST, Norwalk, CT 06851
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Ajay Pal Singh M.d. 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 ID345644803
PECOS Enrollment IDI20250220000751
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.

Areas of Expertise CMS Part B claims 7

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.
152 services151 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.
85 services83 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.
77 services77 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.
66 services63 patients
Injection beneath lining of large bowel using a flexible endoscope 45381
This procedure involves a flexible tube, called an endoscope, being inserted into the large bowel. A small needle is then passed through the tube to inject medication under the bowel lining. This is typically done to treat inflammation or bleeding.
26 services26 patients
Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito G0500
Moderate sedation is a method where a physician uses medication to help you relax during a gastrointestinal endoscopy. An independent trained observer will be present to monitor your vital signs and ensure your safety throughout the procedure. It's a common and safe practice.
16 services16 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 06851 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
$138.84 typical visit price
range $60.82 – $183.10
Typical copayment $34.71 (range $15.20 – $45.77)
Most-billed visit code 99204
Established Patient
$106.68 typical visit price
range $19.76 – $149.26
Typical copayment $26.67 (range $4.94 – $37.31)
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.

JENNIFER I MOORE MD
Pediatrics
40 CROSS ST, SUITE 300
NORWALK, CT 06851
Western Connecticut Planning Region (203) 229-2000
MS. PAULA LEVY LMFT
Marriage & Family Therapist
40 CROSS ST, SUITE 240
NORWALK, CT 06851
Western Connecticut Planning Region (203) 761-9587
COURTNEY LYDDY DPT
Physical Therapist
40 CROSS ST, REHABILITATION SERVICES OF NORWALK HOSPITAL
NORWALK, CT 06851
Western Connecticut Planning Region (203) 840-3170
JEANNE M MARCONI MD
Pediatrics
40 CROSS ST, SUITE 300
NORWALK, CT 06851
Western Connecticut Planning Region (203) 229-2029
RONALD STEVEN KAHAN MD
Dermatology
40 CROSS ST, SUITE 340
NORWALK, CT 06851
Western Connecticut Planning Region (203) 847-1500
JOEL NOEL RAJENDRA SINGH MD
Internal Medicine (Cardiovascular Disease)
40 CROSS ST
NORWALK, CT 06851
Western Connecticut Planning Region (607) 621-7293
DR. KESAV G. NAIR M.D.
Internal Medicine (Medical Oncology)
40 CROSS ST, 4TH FL
NORWALK, CT 06851
Western Connecticut Planning Region (203) 845-4898
RALPH KIRMSER M.D.
Internal Medicine (Cardiovascular Disease)
40 CROSS ST
NORWALK, CT 06851
Western Connecticut Planning Region (203) 845-2160

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 Ajay Singh's NPI number?

The NPI number for Ajay Singh is 1629451026. It was assigned to this individual provider in the NPPES registry on July 2, 2015.

Where is Ajay Singh located?

Ajay Singh practices at 40 Cross St, Norwalk, CT 06851. The listed phone number is (507) 284-2511.

What is Ajay Singh's specialty?

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

Is Ajay Singh enrolled in Medicare?

Yes. Ajay Singh 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.

When was this NPI record last updated?

The NPPES record for Ajay Singh was last updated on May 13, 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.