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DR. JAMES A SINGER M.D.
NPI 1962478818
Internal Medicine - Gastroenterology in Glendale, AZ

Active since February 28, 2006PECOS Enrolled
5823 W EUGIE AVE, STE A, GLENDALE, AZ 85304(602) 843-1265(602) 843-1297 Get Directions Write a Review

NPPES record last updated: February 17, 2017. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. James A Singer M.d. NPPES

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

DR. JAMES A SINGER M.D. (NPI 1962478818) is an individual gastroenterology provider in Glendale, Arizona, licensed in Arizona (12635) and active in the NPI registry since February 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1962478818
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameDR. JAMES A SINGERCredential: M.D.
Location Address5823 W EUGIE AVE, STE AGlendale, AZ 85304-1276
Mailing Address3020 E Camelback Rd, Suite 301Phoenix, AZ 85014-5095 · (602) 264-9100 · Fax (602) 264-9101
Phone(602) 843-1265
Fax(602) 843-1297
Sole ProprietorNo
Enumeration DateFebruary 28, 2006
Last NPPES UpdateFebruary 17, 2017
✔ NPI 1962478818 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
License✔ Licensed in AZ · 12635
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.
5823 W EUGIE AVE, Glendale, AZ 85304
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Other Identifiers 7

Medicare UPIND37661
Medicare PINWCGWL03
Medicaid229999 01AZ
Other120390AZ · Group Medicare Number
Medicare PIN120401AZ
Other317047AZ · Group Medicaid Number
Medicaid229999-05AZ

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. James A Singer M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Reassignment

Medicare enrollment records show James Singer reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Arizona Digestive Health, PC
18 mi
Gastroenterology
3260 N HAYDEN RD STE 112
Scottsdale, AZ 85251
  • Reassigned Medicare billing, Arizona enrollment
  • 143 clinicians in this Medicare group
NPI 1992981583 (602) 264-9100

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 85304 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
$127.71 typical visit price
range $55.44 – $168.60
Typical copayment $31.92 (range $13.86 – $42.15)
Most-billed visit code 99204
Established Patient
$98.00 typical visit price
range $17.72 – $137.41
Typical copayment $24.50 (range $4.43 – $34.35)
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 11

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

MRS. STEPHANIE ANNE TILLEY FNP-C
Nurse Practitioner
5823 W EUGIE AVE
GLENDALE, AZ 85304
Maricopa County (602) 843-1265
DR. MICHAEL JOHN YANISH M.D.
Internal Medicine (Gastroenterology)
5823 W EUGIE AVE, STE A
GLENDALE, AZ 85304
Maricopa County (602) 843-1265
DR. STEVEN ROBERT KANNER M.D
Internal Medicine (Gastroenterology)
5823 W EUGIE AVE, STE A
GLENDALE, AZ 85304
Maricopa County (602) 843-1265
DR. BARRY R WISS D.O.
Internal Medicine (Gastroenterology)
5823 W EUGIE AVE, STE A
GLENDALE, AZ 85304
Maricopa County (602) 843-1265
DR. MARY ANN ATIA MD
Internal Medicine (Gastroenterology)
5823 W EUGIE AVE, STE A
GLENDALE, AZ 85304
Maricopa County (602) 843-1265
THE GLENDALE AZ ENDOSCOPY ASC LLC
Clinic/Center (Ambulatory Surgical)
5823 W EUGIE AVE, SUITE B
GLENDALE, AZ 85304
Maricopa County (602) 439-1717
ARIZONA DIGESTIVE & LIVER DISEASE CONSULTANTS
Internal Medicine (Gastroenterology)
5823 W EUGIE AVE, STE A
GLENDALE, AZ 85304
Maricopa County (602) 843-1265
THUNDERBIRD ENDOSCOPY CENTER
Clinic/Center (Endoscopy)
5823 W EUGIE AVE, STE B
GLENDALE, AZ 85304
Maricopa County (602) 439-1717

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 James Singer's NPI number?

The NPI number for James Singer is 1962478818. It was assigned to this individual provider in the NPPES registry on February 28, 2006.

Where is James Singer located?

James Singer practices at 5823 W Eugie Ave Ste A, Glendale, AZ 85304. The listed phone number is (602) 843-1265.

What is James Singer's specialty?

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

Is James Singer enrolled in Medicare?

Yes. James Singer is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for James Singer's services?

According to the CMS Revalidation Reassignment List (October 2026 release), James Singer reassigns Medicare benefits to Arizona Digestive Health, PC (Scottsdale, AZ). The 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 James Singer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for James Singer was last updated on February 17, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 years 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.