Cynthia Griggs, M.D.
NPI 1154421774 · Nephrology Physician · Detroit, MI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Cynthia Griggs, M.D. is a Nephrology Physician provider in Detroit, MI (NPI 1154421774).
Provider details
- NPI number
- 1154421774
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 4301061868 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
130 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 45 | $129 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 40 | $118 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 25 | $74 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 20 | $174 |
Typical Medicare-allowed amounts for these services range $74–$174 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 23 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 70 | 16 |
| Furosemide | 45 | — |
| Prednisone | 41 | 18 |
| Pantoprazole Sodium | 29 | — |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 26 | — |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 23 | — |
Practice location
Mailing address
Additional practice locations (1)
- 27209 Lahser Rd Ste 220Southfield, MI 48034-8403Phone: (248) 552-9050Fax: (248) 552-1290
Registry dates
- Enumerated
- 2006-09-24
- Last updated
- 2025-03-19
- Certified
- 2025-03-19
Frequently asked questions
- What is Cynthia Griggs's NPI number?
- Cynthia Griggs's National Provider Identifier (NPI) is 1154421774, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Cynthia Griggs's specialty?
- Cynthia Griggs is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Cynthia Griggs located?
- Cynthia Griggs's practice location on file with NPPES is 18455 James Couzens Fwy, Detroit, MI 48235.
- What is Cynthia Griggs's phone number?
- The practice phone number listed in the NPPES registry for Cynthia Griggs is (313) 341-7870.
- Does Cynthia Griggs accept Medicare?
- Cynthia Griggs is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Cynthia Griggs's NPI active?
- Yes — Cynthia Griggs's NPI (1154421774) is active in the NPPES registry as of the last update on 2025-03-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.