What is Calvin Larsen's NPI number?

Calvin Larsen's National Provider Identifier (NPI) is 1659033801, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Calvin Larsen's specialty?

Calvin Larsen is listed in the NPPES registry with a primary specialty of Medical Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).

Where is Calvin Larsen located?

Calvin Larsen's practice location on file with NPPES is 5401 Old Court Rd, Randallstown, MD 21133-5103.

What is Calvin Larsen's phone number?

The practice phone number listed in the NPPES registry for Calvin Larsen is (410) 521-2200.

Does Calvin Larsen accept Medicare?

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

Is Calvin Larsen's NPI active?

Yes — Calvin Larsen's NPI (1659033801) is active in the NPPES registry as of the last update on 2022-09-01.

IndividualActiveAccepts Medicare

Calvin Larsen, PA-C

NPI 1659033801 · Medical Physician Assistant · Randallstown, MD

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

Calvin Larsen, PA-C is a Medical Physician Assistant provider in Randallstown, MD (NPI 1659033801).

Provider details

NPI number: 1659033801
Entity type: Individual
Primary specialty: Medical Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Credential: PA-C
Sex: Male
Sole proprietor: No

Specialties & taxonomies

Medical Physician AssistantPrimary363AM0700XLicense C0008209 (MD)
Physician Assistants & Advanced Practice Nursing Providers
Student in an Organized Health Care Education/Training Program390200000X
Student, Health Care

Profile Score

Established profile(55/100 index)

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

Registry tenure25% of score
4 yrs in NPPES registry
Profile completeness25% of score
83% of core fields populated
Practice footprint15% of score
3 documented practice locations
Medicare service volume (vs. specialty peers)25% of score
151 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 .

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)
Emergency Department Visit With Moderate Level of Medical Decision Making99284	58	$105
Emergency Department Visit With High Level of Medical Decision Making99285	44	$152
Emergency Department Visit With Low Level of Medical Decision Making99283	22	$62
Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010	16	$7
Critical Care, First 30-74 Minutes99291	11	$184

Typical Medicare-allowed amounts for these services range $7–$184 (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 · 1 distinct drug on file.

Drug	Part D claims (2024)
Methylprednisolone	11

Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.

Transparency — industry payments

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

$15 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.

Practice location

5401 Old Court Rd

Randallstown, MD 21133-5103

Phone: (410) 521-2200

Street-level locationGet directions

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Mailing address