DR. MARK STEPHAN OSTREM MD NPI 1811985633

NPI Information

  • NPI: 1811985633
  • Provider Name: DR. MARK STEPHAN OSTREM, MD
  • Classification: Internal Medicine - 207RG0300X
  • Specialization: Geriatric Medicine
  • Entity Type: Individual
  • PECOS Registration: Yes
  • Address: 54 MILLER ST
    SUITE 300
    QUINCY, MA
    ZIP 02169
  • Phone: (617) 481-3300

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NPI Details

DR. Mark Stephan Ostrem, MD is a geriatric medicine internal medicine in Quincy, MA with 50 years of experience. The provider is an internist who has special knowledge of the aging process and special skills in the diagnostic, therapeutic, preventive and rehabilitative aspects of illness in the elderly. This specialist cares for geriatric patients in the patient's home, the office, long-term care settings such as nursing homes and the hospital. DR. Mark Stephan Ostrem, MD NPI is 1811985633. The provider is registered as an individual entity type.

The NPPES NPI record indicates the provider is a male.

Education
Medical School: UNIVERSITY OF MINNESOTA MEDICAL SCHOOL
Graduation Year:1976

The provider's business location address is:

54 MILLER ST
SUITE 300
QUINCY, MA
ZIP 02169-725
Phone: (617) 481-3300
Fax: (617) 481-3305

The NPI 1811985633 is registered in the Medicare Provider, Enrollment, Chain and Ownership System (PECOS). The provider is legally eligible to order and refer Part B (Clinical Laboratory and Imaging), Durable Medical Equipment, Part A Home Health Agency (HHA), Power Mobility Devices.

The following top HCPCS codes were publicly reported for this provider under the Medicare program for the year 2016. The reported codes are based on the top codes for each available Medicare specialty, excluding evaluation and management codes.

  • Follow-up nursing facility visit per day, typically 25 minutes (HCPCS:99309)
  • Follow-up nursing facility visit per day, typically 15 minutes (HCPCS:99308)
  • Initial nursing facility visit per day, typically 45 minutes (HCPCS:99306)
  • Advance care planning, first 30 minutes (HCPCS:99497)
  • Follow-up nursing facility visit per day, typically 10 minutes (HCPCS:99307)
  • Nursing facility discharge management, more than 30 minutes (HCPCS:99316)
  • Follow-up nursing facility visit per day, typically 35 minutes (HCPCS:99310)

The enumeration date for this NPI number is 10/6/2005 and was last updated on 1/15/2018.

Taxonomy Codes

The NPI record includes the healthcare provider taxonomy classification, state license number and state of licensure. The following information regarding the scope of practice of this provider is available:

No. Taxonomy Code Taxonomy Clasification Taxonomy Specialization License Number License State Primary
1207RG0300XInternal MedicineGeriatric Medicine44501MASSACHUSETTSYes

What is NPI?

NPI stands for National Provider Identifier. The NPI is a 10-digit identification number that is completely unique. The NPI number by itself does not contain any identifiable information such as a provider’s speciality or location. The NPI is assigned to individuals or organizacions for their lifespan and it is independent of key provider information type updates like a change of practices, location or speciality.

This page was last updated on: 11/21/2025

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