What is Genevieve Sierminski's NPI number?

Genevieve Sierminski's National Provider Identifier (NPI) is 1376742858, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Genevieve Sierminski's specialty?

Genevieve Sierminski is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).

Where is Genevieve Sierminski located?

Genevieve Sierminski's practice location on file with NPPES is G1071 N Ballenger Hwy, Flint, MI 48504-4453.

What is Genevieve Sierminski's phone number?

The practice phone number listed in the NPPES registry for Genevieve Sierminski is (810) 238-4172.

Does Genevieve Sierminski accept Medicare?

Genevieve Sierminski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.

Is Genevieve Sierminski's NPI active?

Yes — Genevieve Sierminski's NPI (1376742858) is active in the NPPES registry as of the last update on 2012-02-16.

IndividualActiveAccepts Medicare

Genevieve Sierminski, M.D.

NPI 1376742858 · Nephrology Physician · Flint, MI

Genevieve Sierminski, M.D. is a Nephrology Physician provider in Flint, MI (NPI 1376742858).

Provider details

NPI number: 1376742858
Entity type: Individual
Primary specialty: Nephrology PhysicianAllopathic & Osteopathic Physicians
Credential: M.D.
Sex: Female
Sole proprietor: No
License: 4301085687 (MI)

Practice location

G1071 N Ballenger Hwy

Suite 310

Flint, MI 48504-4453

Phone: (810) 238-4172

Fax: (810) 238-4153

Street-level locationGet directions

More MI providers

Mailing address

G1071 N Ballenger Hwy

Flint, MI 48504-4453

Specialties & taxonomies

Nephrology PhysicianPrimary207RN0300XLicense 4301085687 (MI)
Allopathic & Osteopathic Physicians

Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)

Profile Score

Detailed profile(84/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure25% of score
19 yrs in NPPES registry
Profile completeness25% of score
100% of core fields populated
Practice footprint15% of score
1 documented practice location
Medicare service volume (vs. specialty peers)25% of score
1,936 Medicare services, 2024 (ranked within specialty)
Open Payments transparency10% of score
Has Open Payments disclosures (2024)

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)
Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232	656	$74
Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960	346	$337
Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214	281	$97
Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213	148	$84
Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222	131	$125
Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes

What this provider prescribes (Medicare Part D)

Top drugs by Medicare Part D claim volume, 2024 · 34 distinct drugs on file.

Drug	Part D claims (2024)	Beneficiaries
Amlodipine Besylate	212	81
Hydralazine Hcl	132	51
Furosemide	128	45
Losartan Potassium	90	31
Lisinopril	90	34
Potassium Chloride	84	26
Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass	82	68

Transparency — industry payments

Based on CMS Open Payments, 2024; not all care is captured.

$21 across 1 record (Open Payments 2024)

Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.

Enumerated: 2007-07-13
Last updated: 2012-02-16

Frequently asked questions

What is Genevieve Sierminski's NPI number?: Genevieve Sierminski's National Provider Identifier (NPI) is 1376742858, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Genevieve Sierminski's specialty?: Genevieve Sierminski is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
Where is Genevieve Sierminski located?: Genevieve Sierminski's practice location on file with NPPES is G1071 N Ballenger Hwy, Flint, MI 48504-4453.
What is Genevieve Sierminski's phone number?: The practice phone number listed in the NPPES registry for Genevieve Sierminski is (810) 238-4172.
Does Genevieve Sierminski accept Medicare?: Genevieve Sierminski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
Is Genevieve Sierminski's NPI active?: Yes — Genevieve Sierminski's NPI (1376742858) is active in the NPPES registry as of the last update on 2012-02-16.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.

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)
Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232	656	$74
Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960	346	$337
Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214	281	$97
Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213	148	$84
Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222	131	$125
Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes

Drug

Part D claims (2024)

Beneficiaries

Amlodipine Besylate

212

Hydralazine Hcl

132

Furosemide

128

Losartan Potassium

Lisinopril

Potassium Chloride

Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass

Transparency — industry payments

Based on CMS Open Payments, 2024; not all care is captured.

$21 across 1 record (Open Payments 2024)

Provider details

Practice location

Mailing address

Specialties & taxonomies

Profile Score

What this provider does (Medicare)

What this provider prescribes (Medicare Part D)

Transparency — industry payments

Registry dates

Frequently asked questions

Specialties & taxonomies

Frequently asked questions

Profile Score

What this provider does (Medicare)

What this provider prescribes (Medicare Part D)

Transparency — industry payments