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GREGORY M NORRIS MD
NPI 1821203274
Psychiatry & Neurology - Neurology in Detroit, MI

Active since May 11, 2007PECOS EnrolledAccepts Medicare Assignment
4201 SAINT ANTOINE ST, SUITE 8A, DETROIT, MI 48201(313) 745-4275(313) 745-4468 Get Directions Write a Review

NPPES record last updated: February 6, 2019. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Feb 6, 2019, Nov 17, 2015 (2 updates tracked since 2015).

About Gregory M Norris Md NPPES

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

GREGORY M NORRIS MD (NPI 1821203274) is an individual neurology provider in Detroit, Michigan, licensed in Michigan (4301080461) and active in the NPI registry since May 2007. He is enrolled in Medicare PECOS, is affiliated with Mclaren Bay Region, and is a graduate of Wayne State University School Of Medicine (2002).

NPPES Registry Identity

NPI1821203274
Entity TypeIndividualMale
Primary Taxonomy2084N0400X
Provider Legal NameGREGORY M NORRISCredential: MD
Location Address4201 SAINT ANTOINE ST, SUITE 8ADetroit, MI 48201-2153
Mailing Address401 S Ballenger HwyFlint, MI 48532-3638 · (810) 342-5700 · Fax (810) 342-5545
Phone(313) 745-4275
Fax(313) 745-4468
Sole ProprietorNo
Medical School CMSWayne State University School Of MedicineGraduated 2002
Enumeration DateMay 11, 2007
Last NPPES UpdateFebruary 6, 20192 updates tracked since enumeration
✔ NPI 1821203274 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · NeurologyAllopathic & Osteopathic Physicians
Taxonomy Code2084N0400X
License✔ Licensed in MI · 4301080461
Definition
A Neurologist specializes in the diagnosis and treatment of diseases or impaired function of the brain, spinal cord, peripheral nerves, muscles, autonomic nervous system, and blood vessels that relate to these structures.
4201 SAINT ANTOINE ST, Detroit, MI 48201
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Buckeye Health Plan, Ambetter from Meridian, Ambetter Health and more.Insurance ›

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

Gregory M Norris Md 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 ID5496849333
PECOS Enrollment IDI20070921000717
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

6

Medicare enrollment records show Gregory Norris reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Mclaren Macomb
18 mi
Internal Medicine
1000 HARRINGTON BLVD.
Mount Clemens, MI 48043
  • Reassigned Medicare billing, Michigan enrollment
  • 188 clinicians in this Medicare group
NPI 1396014601 (586) 493-8000
Sjmh Medical Practice-Smhc
21 mi
Internal Medicine
44405 WOODWARD AVE
Pontiac, MI 48341
  • Reassigned Medicare billing, Michigan enrollment
  • 139 clinicians in this Medicare group
NPI 1346284684 (248) 858-6144
Mclaren Medical Group
51 mi
Diagnostic Radiology
1254 N MAIN ST
Lapeer, MI 48446
  • Reassigned Medicare billing, Michigan enrollment
  • 416 clinicians in this Medicare group
NPI 1073650750 (810) 664-4531
Mclaren Flint
57 mi
General Practice
401 S BALLENGER HWY
Flint, MI 48532
  • Reassigned Medicare billing, Michigan enrollment
  • 242 clinicians in this Medicare group
NPI 1275807372 (810) 342-2000
Mclaren Bay Region
94 mi
Pulmonary Disease
640 S TRUMBULL ST
Bay City, MI 48708
  • Reassigned Medicare billing, Michigan enrollment
  • 250 clinicians in this Medicare group
NPI 1083974323 (989) 893-7460
Mclaren Northern Michigan
229 mi
Family Medicine
416 CONNABLE AVE
Petoskey, MI 49770
  • Reassigned Medicare billing, Michigan enrollment
  • 149 clinicians in this Medicare group
NPI 1760736094 (231) 487-4000

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 3

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.

Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
132 services61 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.
80 services44 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.
14 services14 patients

Hospital Affiliations CMS Care Compare

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

Mclaren Bay Region

Acute Care Hospitals · Bay City, MI
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number230041
Location1900 Columbus AveBay City, MI 48708 · Bay County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 48201 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
$134.28 typical visit price
range $58.04 – $177.36
Typical copayment $33.57 (range $14.51 – $44.34)
Most-billed visit code 99204
Established Patient
$102.35 typical visit price
range $18.32 – $143.49
Typical copayment $25.58 (range $4.58 – $35.87)
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.

DR. ZOHA NIZAMI
Pediatrics (Pediatric Emergency Medicine)
4201 SAINT ANTOINE ST
DETROIT, MI 48201
Wayne County (313) 745-5146
DR. PUJA LAROIA DO
Anesthesiology
4201 SAINT ANTOINE ST
DETROIT, MI 48201
Wayne County (313) 745-5146
ELIZABETH ANNE RANELLA CRNA
Nurse Anesthetist, Certified Registered
4201 SAINT ANTOINE ST
DETROIT, MI 48201
Wayne County (952) 442-9770
GERARD LANCASTER MD
Orthopaedic Surgery
4201 SAINT ANTOINE ST
DETROIT, MI 48201
Wayne County (313) 745-3000
SARAH ZHANG
Emergency Medicine
4201 SAINT ANTOINE ST, UHC-6G
DETROIT, MI 48201
Wayne County (313) 993-2529
DAVID BURKHOLDER
Student in an Organized Health Care Education/Training Program
4201 SAINT ANTOINE ST, 6G UHC
DETROIT, MI 48201
Wayne County (313) 993-2530
DR. DANIEL RAY CAVAZOS MD
Orthopaedic Surgery
4201 SAINT ANTOINE ST
DETROIT, MI 48201
Wayne County (313) 745-3000
WAHAJUDDIN MOHAMMAD DO
Student in an Organized Health Care Education/Training Program
4201 SAINT ANTOINE ST
DETROIT, MI 48201
Wayne County (313) 745-5146

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 Gregory Norris's NPI number?

The NPI number for Gregory Norris is 1821203274. It was assigned to this individual provider in the NPPES registry on May 11, 2007.

Where is Gregory Norris located?

Gregory Norris practices at 4201 Saint Antoine St Suite 8A, Detroit, MI 48201. The listed phone number is (313) 745-4275.

What is Gregory Norris's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Neurology, with taxonomy code 2084N0400X.

Is Gregory Norris enrolled in Medicare?

Yes. Gregory Norris 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 Gregory Norris's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Norris reassigns Medicare benefits to 6 organizations: Mclaren Macomb (Mount Clemens, MI), Sjmh Medical Practice-Smhc (Pontiac, MI), Mclaren Medical Group (Lapeer, MI), Mclaren Flint (Flint, MI), Mclaren Bay Region (Bay City, MI) and 1 more organization, listed in the Medicare section above. 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 Gregory Norris's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Gregory Norris accept?

Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Blue Care Network of Michigan and Blue Cross Blue Shield of Michigan Mutual Insurance Company and 2 other insurers list Gregory Norris as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Gregory Norris affiliated with any hospitals?

According to CMS data, Gregory Norris is affiliated with Mclaren Bay Region.

When was this NPI record last updated?

The NPPES record for Gregory Norris was last updated on February 6, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.