1. Home
  2. Directory
  3. Massachusetts
  4. Northampton
  5. Psychiatry Neurology
  6. NPI Profile
Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. MICHAEL OSULLIVAN DO
NPI 1043887300
Psychiatry & Neurology - Psychiatry in Northampton, MA

Active since June 07, 2021PECOS EnrolledAccepts Medicare Assignment
79 MASONIC ST, NORTHAMPTON, MA 01060(413) 483-3282(413) 679-5822 Get Directions Write a Review

NPPES record last updated: September 10, 2026. Verified against the NPPES registry weekly; last sync: September 13, 2026.

Record update history: Sep 10, 2026, Jun 7, 2021 (2 updates tracked since 2021).

About Dr. Michael Osullivan Do NPPES

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

DR. MICHAEL OSULLIVAN DO (NPI 1043887300) is an individual psychiatry provider in Northampton, Massachusetts, licensed in Massachusetts (288395) and active in the NPI registry since June 2021. He is enrolled in Medicare PECOS and is a graduate of University Of New England, College Of Osteo Medicine (2021).

NPPES Registry Identity

NPI1043887300
Entity TypeIndividualMale
Primary Taxonomy2084P0800X
Provider Legal NameDR. MICHAEL OSULLIVANCredential: DO
Location Address79 MASONIC STNorthampton, MA 01060-3008
Mailing Address79 Masonic StNorthampton, MA 01060-3008 · (413) 483-3282 · Fax (413) 679-5822
Phone(413) 483-3282
Fax(413) 679-5822
Sole ProprietorYes
Medical School CMSUniversity Of New England, College Of Osteo MedicineGraduated 2021
Enumeration DateJune 7, 2021
Last NPPES UpdateSeptember 10, 20262 updates tracked since enumeration
NPPES CertifiedSeptember 10, 2026
✔ NPI 1043887300 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0800X
License✔ Licensed in MA · 288395
Definition
A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.
79 MASONIC ST, Northampton, MA 01060
Open in Google Maps ↗

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

Dr. Michael Osullivan Do 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 ID2264835636
PECOS Enrollment IDI20231206002096
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.

Areas of Expertise CMS Part B claims

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231
Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.
16 services12 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 01060 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
$177.36 typical visit price
range $58.86 – $177.36
Typical copayment $44.34 (range $14.71 – $44.34)
Most-billed visit code 99205
Established Patient
$73.22 typical visit price
range $19.11 – $144.84
Typical copayment $18.30 (range $4.77 – $36.21)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Michael Osullivan's NPI number?

The NPI number for Michael Osullivan is 1043887300. It was assigned to this individual provider in the NPPES registry on June 7, 2021.

Where is Michael Osullivan located?

Michael Osullivan practices at 79 Masonic St, Northampton, MA 01060. The listed phone number is (413) 483-3282.

What is Michael Osullivan's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Is Michael Osullivan enrolled in Medicare?

Yes. Michael Osullivan 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.

When was this NPI record last updated?

The NPPES record for Michael Osullivan was last updated on September 10, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 days 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.