1. Home
  2. Directory
  3. Maryland
  4. Baltimore
  5. Hospitalist
  6. NPI Profile

CASSIDY CLAASSEN M.D.
NPI 1477796696
Hospitalist in Baltimore, MD

Active since April 17, 2009PECOS EnrolledAccepts Medicare Assignment
22 S GREENE ST, BALTIMORE, MD 21201(410) 328-2882(410) 328-2977 Get Directions Write a Review

NPPES record last updated: February 1, 2013. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Cassidy Claassen M.d. NPPES

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

CASSIDY CLAASSEN M.D. (NPI 1477796696) is an individual hospitalist provider in Baltimore, Maryland, licensed in Maryland (D74704) and active in the NPI registry since April 2009. He is enrolled in Medicare PECOS, is affiliated with University Of Maryland Medical Center, and is a graduate of University Of Maryland School Of Medicine (2009).

NPPES Registry Identity

NPI1477796696
Entity TypeIndividualMale
Primary Taxonomy208M00000X
Provider Legal NameCASSIDY CLAASSENCredential: M.D.
Location Address22 S GREENE STBaltimore, MD 21201-1544
Mailing AddressPo Box 64442Baltimore, MD 21264-4442 · (410) 328-2882 · Fax (410) 328-2977
Phone(410) 328-2882
Fax(410) 328-2977
Sole ProprietorNo
Medical School CMSUniversity Of Maryland School Of MedicineGraduated 2009
Enumeration DateApril 17, 2009
Last NPPES UpdateFebruary 1, 2013
✔ NPI 1477796696 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyHospitalistAllopathic & Osteopathic Physicians
Taxonomy Code208M00000X
License✔ Licensed in MD · D74704
Definition
Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.
22 S GREENE ST, Baltimore, MD 21201
Open in Google Maps ↗

Other Identifiers 4

Medicaid335424500MD
Medicare PIN249304Y1PMD
OtherS062-0489MD · Carefirst Bc/bs
Medicare PINP01122434MD

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

Cassidy Claassen 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 ID6901055631
PECOS Enrollment IDI20121012000300
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.

Hospital Affiliations CMS Care Compare

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

University Of Maryland Medical Center

Acute Care Hospitals · Baltimore, MD
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number210002
Location22 South Greene StreetBaltimore, MD 21201 · Baltimore City County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 21201 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
$139.05 typical visit price
range $60.73 – $183.44
Typical copayment $34.76 (range $15.18 – $45.86)
Most-billed visit code 99204
Established Patient
$106.59 typical visit price
range $19.60 – $149.17
Typical copayment $26.64 (range $4.90 – $37.29)
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 20

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

DR. LEONARD ANANG SOWAH M.D.
Internal Medicine
22 S GREENE ST
BALTIMORE, MD 21201
Baltimore City (410) 706-4619
VISHAL BHATNAGAR MD
Student in an Organized Health Care Education/Training Program
22 S GREENE ST, MEDICINE, N3E09
BALTIMORE, MD 21201
Baltimore City (410) 328-6110
NANCE J FOX P.A.-C
Physician Assistant (Medical)
22 S GREENE ST, G2K36
BALTIMORE, MD 21201
Baltimore City (410) 328-1170
HILARY TAMARA WOLF MD
Pediatrics (Adolescent Medicine)
22 S GREENE ST
BALTIMORE, MD 21201
Baltimore City (410) 328-7373
MS. LINDSAY BREAM O'MEARA CRNP
Nurse Practitioner (Acute Care)
22 S GREENE ST, SUITE S4D07
BALTIMORE, MD 21201
Baltimore City (410) 328-3365
NORA T OLIVER M.D., M.P.H.
Student in an Organized Health Care Education/Training Program
22 S GREENE ST, N3E09
BALTIMORE, MD 21201
Baltimore City (410) 328-5756
SHOSHANA JO WEINER
Internal Medicine
22 S GREENE ST
BALTIMORE, MD 21201
Baltimore City (617) 214-1332
JENNA VANLIERE CANZONIERO M.D.
Internal Medicine
22 S GREENE ST, N3E09
BALTIMORE, MD 21201
Baltimore City (410) 328-5756

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 Cassidy Claassen's NPI number?

The NPI number for Cassidy Claassen is 1477796696. It was assigned to this individual provider in the NPPES registry on April 17, 2009.

Where is Cassidy Claassen located?

Cassidy Claassen practices at 22 S Greene St, Baltimore, MD 21201. The listed phone number is (410) 328-2882.

What is Cassidy Claassen's specialty?

The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.

Is Cassidy Claassen enrolled in Medicare?

Yes. Cassidy Claassen 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.

Is Cassidy Claassen affiliated with any hospitals?

According to CMS data, Cassidy Claassen is affiliated with University Of Maryland Medical Center.

When was this NPI record last updated?

The NPPES record for Cassidy Claassen was last updated on February 1, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 years 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.