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JOSEPH AHN M.D.
NPI 1477812733
Psychiatry & Neurology - Psychiatry in Boston, MA

Active since May 08, 2012PECOS EnrolledAccepts Medicare Assignment
55 FRUIT ST # 812, BOSTON, MA 02114(617) 724-5600 Get Directions Write a Review

NPPES record last updated: March 18, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Mar 18, 2025, Jul 21, 2022, Mar 17, 2018 and 2 more (5 updates tracked since 2017).

About Joseph Ahn M.d. NPPES

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

JOSEPH AHN M.D. (NPI 1477812733) is an individual psychiatry provider in Boston, Massachusetts, licensed in Massachusetts (267629) and active in the NPI registry since May 2012. He is enrolled in Medicare PECOS, is affiliated with Massachusetts General Hospital, and is a graduate of Creighton University School Of Medicine (2012).

NPPES Registry Identity

NPI1477812733
Entity TypeIndividualMale
Primary Taxonomy2084P0800X
Provider Legal NameJOSEPH AHNCredential: M.D.
Location Address55 FRUIT ST # 812Boston, MA 02114-2621
Mailing Address15 Parkman St, Wac812Boston, MA 02114-3117 · (617) 724-5600 · Fax (617) 726-7541
Phone(617) 724-5600
Sole ProprietorNo
Medical School CMSCreighton University School Of MedicineGraduated 2012
Enumeration DateMay 8, 2012
Last NPPES UpdateMarch 18, 20255 updates tracked since enumeration
NPPES CertifiedMarch 18, 2025
✔ NPI 1477812733 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0800X
License✔ Licensed in MA · 267629
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.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
55 FRUIT ST # 812, Boston, MA 02114
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, Harvard Pilgrim Health Care.Insurance ›

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

Joseph Ahn 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 ID7214235407
PECOS Enrollment IDI20171017002512
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 5

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.

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
160 services56 patients
Telephone medical discussion with physician, 21-30 minutes 99443
This service involves a 21-30 minute phone conversation with a physician. It's a chance for you to discuss your health concerns, symptoms or treatment plans. It's similar to an in-person consultation, but conducted over the phone for your convenience and safety.
159 services41 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
112 services45 patients
Psychiatric diagnostic evaluation with medical services 90792
A psychiatric diagnostic evaluation with medical services is a comprehensive assessment. It includes a detailed examination of your mental health and physical wellbeing, as well as your personal and family history. This evaluation aids in creating an effective treatment plan.
31 services31 patients
Telephone medical discussion with physician, 21-30 minutes 99443
This service involves a 21-30 minute phone conversation with a physician. It's a chance for you to discuss your health concerns, symptoms or treatment plans. It's similar to an in-person consultation, but conducted over the phone for your convenience and safety.
14 services14 patients

Hospital Affiliations CMS Care Compare

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

Massachusetts General Hospital

Acute Care Hospitals · Boston, MA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220071
Location55 Fruit StreetBoston, MA 02114 · Suffolk County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02114 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
$189.86 typical visit price
range $63.72 – $189.86
Typical copayment $47.46 (range $15.93 – $47.46)
Most-billed visit code 99205
Established Patient
$78.84 typical visit price
range $21.07 – $155.29
Typical copayment $19.71 (range $5.26 – $38.82)
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.

Other Providers at the Same Location NPPES

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

DR. JUSTINE HOLLY MANN MD
Psychiatry & Neurology (Psychiatry)
55 FRUIT ST # 812
BOSTON, MA 02114
Suffolk County (617) 724-5600

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 Joseph Ahn's NPI number?

The NPI number for Joseph Ahn is 1477812733. It was assigned to this individual provider in the NPPES registry on May 8, 2012.

Where is Joseph Ahn located?

Joseph Ahn practices at 55 Fruit St # 812, Boston, MA 02114. The listed phone number is (617) 724-5600.

What is Joseph Ahn's specialty?

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

Is Joseph Ahn enrolled in Medicare?

Yes. Joseph Ahn 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.

What insurance does Joseph Ahn accept?

Health plans from Anthem Blue Cross and Blue Shield and Harvard Pilgrim Health Care list Joseph Ahn as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Joseph Ahn affiliated with any hospitals?

According to CMS data, Joseph Ahn is affiliated with Massachusetts General Hospital.

When was this NPI record last updated?

The NPPES record for Joseph Ahn was last updated on March 18, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 months 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.