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DR. CYNTHIA CLAUDINE GRIGGS M.D.
NPI 1154421774
Internal Medicine - Nephrology in Detroit, MI

Active since September 24, 2006PECOS EnrolledAccepts Medicare AssignmentCLIA Certified · 2 labs
18455 JAMES COUZENS FWY, DETROIT, MI 48235(313) 341-7870(313) 341-7950 Get Directions Write a Review

NPPES record last updated: March 19, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Dr. Cynthia Claudine Griggs M.d. NPPES

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

DR. CYNTHIA CLAUDINE GRIGGS M.D. (NPI 1154421774) is an individual nephrology provider in Detroit, Michigan, licensed in Michigan (4301061868) and active in the NPI registry since September 2006. She is enrolled in Medicare PECOS, holds 2 active CLIA laboratory certificates, and is affiliated with Sinai-grace Hospital.

NPPES Registry Identity

NPI1154421774
Entity TypeIndividualFemale
Primary Taxonomy207RN0300X
Provider Legal NameDR. CYNTHIA CLAUDINE GRIGGSCredential: M.D.
Location Address18455 JAMES COUZENS FWYDetroit, MI 48235
Mailing Address18455 James Couzens FwyDetroit, MI 48235 · (313) 341-7870 · Fax (313) 341-7950
Phone(313) 341-7870
Fax(313) 341-7950
Sole ProprietorYes
Medical School CMSWayne State University School Of MedicineGraduated 1993
Enumeration DateSeptember 24, 2006
Last NPPES UpdateMarch 19, 2025
NPPES CertifiedMarch 19, 2025
✔ NPI 1154421774 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
License✔ Licensed in MI · 4301061868
Definition
An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.
Also ListedInternal MedicineTaxonomy 207R00000X · License 4301061868 (MI)
18455 JAMES COUZENS FWY, Detroit, MI 48235
Open in Google Maps ↗

Secondary Practice Location 1

Location 127209 Lahser Rd Ste 220Southfield, MI 48034-8403 · Phone (248) 552-9050 · Fax (248) 552-1290

Other Identifiers 1

Medicaid4095773MI

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, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Cynthia Claudine Griggs 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 ID345209391
PECOS Enrollment IDI20041215000023
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.

CLIA Laboratory Certificates CMS CLIA 2

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 23D2325653

Dr Cynthia Griggs · Southfield, MI
Active · expires Jun 16, 2027
CLIA Number23D2325653
Laboratory TypePhysician Office
Certificate Effective DateJune 17, 2025
Certificate Expiration DateJune 16, 2027
Laboratory DirectorCynthia Griggs
Laboratory Phone(248) 552-9050
Laboratory LocationDr Cynthia Griggs27209 Lahser Rd Suite 220, Southfield, MI 48034
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory to perform only waived tests.

Certificate of Waiver 23D1040042

Dr Cynthia Griggs · Detroit, MI
Active · expires Apr 27, 2027
CLIA Number23D1040042
Laboratory TypePhysician Office
Certificate Effective DateApril 28, 2025
Certificate Expiration DateApril 27, 2027
Laboratory DirectorCynthia Griggs
Laboratory Phone(248) 552-9050
Laboratory LocationDr Cynthia Griggs18600 James Couzens, Detroit, MI 48235
CLIA data matches this NPI record on: Name Phone
This certificate is issued to a laboratory to perform only waived tests.

Areas of Expertise CMS Part B claims 4

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.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
45 services17 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
40 services15 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.
25 services13 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
20 services15 patients

Hospital Affiliations CMS Care Compare 3

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

Sinai-Grace Hospital

Acute Care Hospitals · Detroit, MI
1/5 CMS rating
OwnershipProprietary
CMS Certification Number230024
Location6071 W Outer DriveDetroit, MI 48235 · Wayne County
Emergency services Birthing friendly

Harper University Hospital

Acute Care Hospitals · Detroit, MI
1/5 CMS rating
OwnershipProprietary
CMS Certification Number230104
Location3990 John R StreetDetroit, MI 48201 · Wayne County
Emergency services Birthing friendly

Beaumont Hospital Royal Oak

Acute Care Hospitals · Royal Oak, MI
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number230130
Location3601 W Thirteen Mile RdRoyal Oak, MI 48073 · Oakland County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 48235 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 2

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

CC GRIGGS HOLDING, LTD.
Internal Medicine (Nephrology)
18455 JAMES COUZENS FWY
DETROIT, MI 48235
Wayne County (313) 341-7870
MICHIGAN WELLNESS 1 LLC
Clinic/Center (Primary Care)
18455 JAMES COUZENS FWY
DETROIT, MI 48235
Wayne County (313) 204-8911

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 Cynthia Griggs's NPI number?

The NPI number for Cynthia Griggs is 1154421774. It was assigned to this individual provider in the NPPES registry on September 24, 2006.

Where is Cynthia Griggs located?

Cynthia Griggs practices at 18455 James Couzens Fwy, Detroit, MI 48235. The listed phone number is (313) 341-7870.

What is Cynthia Griggs's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Is Cynthia Griggs enrolled in Medicare?

Yes. Cynthia Griggs 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.

Does Cynthia Griggs hold CLIA laboratory certificates?

Yes. 2 active CLIA laboratory certificates are associated with this NPI under the federal Clinical Laboratory Improvement Amendments program. The certificates are listed in the CLIA Laboratory Certificates section above.

What insurance does Cynthia Griggs accept?

Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Blue Cross Blue Shield of Michigan Mutual Insurance Company and Priority Health list Cynthia Griggs 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 Cynthia Griggs affiliated with any hospitals?

According to CMS data, Cynthia Griggs is affiliated with Sinai-Grace Hospital, Harper University Hospital and Beaumont Hospital Royal Oak.

When was this NPI record last updated?

The NPPES record for Cynthia Griggs was last updated on March 19, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.