What is Matthew Niemi's NPI number?

Matthew Niemi's National Provider Identifier (NPI) is 1053548321, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Matthew Niemi's specialty?

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

Where is Matthew Niemi located?

Matthew Niemi's practice location on file with NPPES is 55 Lake Ave N, Worcester, MA 01655-0002.

What is Matthew Niemi's phone number?

The practice phone number listed in the NPPES registry for Matthew Niemi is (508) 856-3155.

Does Matthew Niemi accept Medicare?

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

Is Matthew Niemi's NPI active?

Yes — Matthew Niemi's NPI (1053548321) is active in the NPPES registry as of the last update on 2020-10-27.

IndividualActiveAccepts Medicare

Matthew Niemi, M.D.

NPI 1053548321 · Nephrology Physician · Worcester, MA

Matthew Niemi, M.D. is a Nephrology Physician provider in Worcester, MA (NPI 1053548321).

Provider details

NPI number: 1053548321
Entity type: Individual
Primary specialty: Nephrology PhysicianAllopathic & Osteopathic Physicians
Credential: M.D.
Sex: Male
Sole proprietor: No
License: 251074 (MA)

Practice location

55 Lake Ave N

Department of Nephrology

Worcester, MA 01655-0002

Phone: (508) 856-3155

Street-level locationGet directions

More MA providers

Mailing address

Po Box 415348

Boston, MA 02241-5348

Specialties & taxonomies

Nephrology PhysicianPrimary207RN0300XLicense 251074 (MA)
Allopathic & Osteopathic Physicians

Additional practice locations (1)

157 Union St
Marlborough, MA 01752-1228
Phone: (508) 856-3155
Fax: (508) 856-3111

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

Profile Score

Detailed profile(76/100 index)

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

Registry tenure25% of score
17 yrs in NPPES registry
Profile completeness25% of score
100% of core fields populated
Practice footprint15% of score
2 documented practice locations
Medicare service volume (vs. specialty peers)25% of score
939 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)
Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214	236	$98
Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211	164	$17
Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232	149	$79
Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233	102	$119
Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960	67	$361

What this provider prescribes (Medicare Part D)

Top drugs by Medicare Part D claim volume, 2024 · 24 distinct drugs on file.

Drug	Part D claims (2024)	Beneficiaries
Calcitriol	117	36
Lisinopril	113	41
Losartan Potassium	105	29
Empagliflozinbrand: Jardiance	82	20
Furosemide	62	18
Amlodipine Besylate	53	24
Sucroferric Oxyhydroxidebrand: Velphoro	40

Transparency — industry payments

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

$131 across 2 records (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: 2009-06-15
Last updated: 2020-10-27
Certified: 2020-10-27

Frequently asked questions

What is Matthew Niemi's NPI number?: Matthew Niemi's National Provider Identifier (NPI) is 1053548321, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Matthew Niemi's specialty?: Matthew Niemi is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
Where is Matthew Niemi located?: Matthew Niemi's practice location on file with NPPES is 55 Lake Ave N, Worcester, MA 01655-0002.
What is Matthew Niemi's phone number?: The practice phone number listed in the NPPES registry for Matthew Niemi is (508) 856-3155.
Does Matthew Niemi accept Medicare?: Matthew Niemi is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
Is Matthew Niemi's NPI active?: Yes — Matthew Niemi's NPI (1053548321) is active in the NPPES registry as of the last update on 2020-10-27.

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)
Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214	236	$98
Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211	164	$17
Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232	149	$79
Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233	102	$119
Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960	67	$361

Drug

Part D claims (2024)

Beneficiaries

Calcitriol

117

Lisinopril

113

Losartan Potassium

105

Empagliflozinbrand: Jardiance

Furosemide

Amlodipine Besylate

Sucroferric Oxyhydroxidebrand: Velphoro

Transparency — industry payments

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

$131 across 2 records (Open Payments 2024)

Provider details

Practice location

Mailing address

Specialties & taxonomies

Additional practice locations (1)

Profile Score

What this provider does (Medicare)

What this provider prescribes (Medicare Part D)

Transparency — industry payments

Registry dates

Frequently asked questions

Specialties & taxonomies

Additional practice locations (1)

Frequently asked questions

Profile Score

What this provider does (Medicare)

What this provider prescribes (Medicare Part D)

Transparency — industry payments