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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. TAHIR TELLIOGLU M.D.
NPI 1871535534
Psychiatry & Neurology - Addiction Psychiatry in Boston, MA

Active since June 10, 2006PECOS EnrolledAccepts Medicare Assignment
100 BLOSSOM ST, MGH COX CLINIC, BOSTON, MA 02114(617) 643-5457(617) 726-8950 Get Directions Write a Review

NPPES record last updated: September 28, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Sep 28, 2026, Jul 30, 2026, May 7, 2026 and 3 more (6 updates tracked since 2020).

About Dr. Tahir Tellioglu M.d. NPPES

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

DR. TAHIR TELLIOGLU M.D. (NPI 1871535534) is an individual addiction psychiatry provider in Boston, Massachusetts, licensed in Massachusetts (277173) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with Massachusetts General Hospital, and maintains 8 additional practice locations.

NPPES Registry Identity

NPI1871535534
Entity TypeIndividualMale
Primary Taxonomy2084P0802X
Provider Legal NameDR. TAHIR TELLIOGLUCredential: M.D.
Location Address100 BLOSSOM ST, MGH COX CLINICBoston, MA 02114-0211
Mailing Address175 Joseph CtWarwick, RI 02886-9545 · (203) 843-2928 · Fax (270) 216-6261
Phone(617) 643-5457
Fax(617) 726-8950
Sole ProprietorNo
Medical School CMSOtherGraduated 1991
Enumeration DateJune 10, 2006
Last NPPES UpdateSeptember 28, 20266 updates tracked since enumeration
NPPES CertifiedSeptember 28, 2026
✔ NPI 1871535534 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPsychiatry & Neurology · Addiction PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0802X
License✔ Licensed in MA · 277173
Definition
Addiction Psychiatry is a subspecialty of psychiatry that focuses on evaluation and treatment of individuals with alcohol, drug, or other substance-related disorders, and of individuals with dual diagnosis of substance-related and other psychiatric disorders.
Also ListedPsychiatry & Neurology · PsychiatryTaxonomy 2084P0800X · License 35084 (NH), 0101284621 (VA), MD12140 (RI), 043151 (CT), 338440 (NY), ME179175 (FL), 61865 (KY), 109819 (GA), C207425 (CA), MD29348 (ME), 2024-03114 (NC), MD493016 (PA), W0750 (TX), 25MA12996600 (NJ)
100 BLOSSOM ST, Boston, MA 02114
Open in Google Maps ↗

Secondary Practice Locations 8

Location 1741 Piedmont Ave NE Ste 200Atlanta, GA 30308-1420 · Phone (678) 701-7073
Location 215497 W Sand StVictorville, CA 92392-2910 · Phone (442) 327-9311
Location 31280 Lexington Ave Frnt 2New York, NY 10028-2136 · Phone (205) 964-2924
Location 4511 S Orange AveNewark, NJ 07103-1342 · Phone (205) 964-2924
Location 520 Foundry St Fl 2Concord, NH 03301-5419 · Phone (617) 643-5457
Location 610 Dorrance St Ste 700Providence, RI 02903-2014 · Phone (205) 964-2924
Location 71245 Farmington AveWest Hartford, CT 06107-2667 · Phone (205) 964-2924
Location 8255 S Orange Ave Ste 104Orlando, FL 32801-3411 · Phone (205) 964-2924

Other Identifiers 1

Other11583072RI · Caqh Provider Id

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, Taro Health and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Tahir Tellioglu 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 ID5799780037
PECOS Enrollment IDI20181205003213
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.

Medicare Billing Reassignments

4

Medicare enrollment records show Tahir Tellioglu reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Massachusetts General Physicians Organization Inc
0.1 mi
Dermatology
55 FRUIT ST, BUL 2
Boston, MA 02114
  • Reassigned Medicare billing, Massachusetts enrollment
  • 6,360 clinicians in this Medicare group
NPI 1801874573 (617) 724-0287
The General Hospital Corporation
0.1 mi
General Acute Care Hospital
55 FRUIT ST, BULFINCH 360
Boston, MA 02114
  • Reassigned Medicare billing, Massachusetts enrollment
  • 6,234 clinicians in this Medicare group
NPI 1023049236 (617) 726-2000
Rhode Island Hospital
42 mi
Multi-Specialty
593 EDDY ST
Providence, RI 02903
  • Reassigned Medicare billing, Rhode Island enrollment
  • 358 clinicians in this Medicare group
NPI 1154537520 (401) 444-6905
High Desert Psychological Services
2,535 mi
Psychologist
15497 W SAND ST
Victorville, CA 92392
  • Reassigned Medicare billing, California enrollment
  • 124 clinicians in this Medicare group
NPI 1104463371 (442) 327-9311

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 2

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 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.
95 services21 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.
68 services13 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

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. PAUL MARTIN BUSSE PHD MD
Radiology (Therapeutic Radiology)
100 BLOSSOM ST, COX LL
BOSTON, MA 02114
Suffolk County (617) 724-1548
MISS LEANNE NASSAR WINES PA-C
Physician Assistant (Medical)
100 BLOSSOM ST, COX 630
BOSTON, MA 02114
Suffolk County (617) 724-4810
DR. ROBY P BHATTACHARYYA MD, PHD
Internal Medicine
100 BLOSSOM ST, MASSACHUSETTS GENERAL HOSPITAL, COX-5
BOSTON, MA 02114
Suffolk County (617) 726-2066
DR. GEORGE PETER CANELLOS MD
Internal Medicine (Hematology & Oncology)
100 BLOSSOM ST, COX 460
BOSTON, MA 02114
Suffolk County (617) 726-8314
DR. TORUNN YOCK MD
Radiology (Radiation Oncology)
100 BLOSSOM ST, COX 3
BOSTON, MA 02114
Suffolk County (617) 724-1548
MS. MAUREEN TERESA DORAN RN, MPH
Registered Nurse
100 BLOSSOM ST, COX 5-506C
BOSTON, MA 02114
Suffolk County (617) 642-3991
DR. MELIN JANARDAN KHANDEKAR M.D., PH.D.
Radiology (Radiation Oncology)
100 BLOSSOM ST, COX 3
BOSTON, MA 02114
Suffolk County (617) 726-8650
DR. YI WANG PHD
Radiology (Radiological Physics)
100 BLOSSOM ST
BOSTON, MA 02114
Suffolk County (617) 724-3108

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 Tahir Tellioglu's NPI number?

The NPI number for Tahir Tellioglu is 1871535534. It was assigned to this individual provider in the NPPES registry on June 10, 2006.

Where is Tahir Tellioglu located?

Tahir Tellioglu practices at 100 Blossom St Mgh Cox Clinic, Boston, MA 02114. The listed phone number is (617) 643-5457.

What is Tahir Tellioglu's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Addiction Psychiatry, with taxonomy code 2084P0802X.

Is Tahir Tellioglu enrolled in Medicare?

Yes. Tahir Tellioglu 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.

Which organizations bill Medicare for Tahir Tellioglu's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Tahir Tellioglu reassigns Medicare benefits to 4 organizations: Massachusetts General Physicians Organization Inc (Boston, MA), The General Hospital Corporation (Boston, MA), Rhode Island Hospital (Providence, RI) and High Desert Psychological Services (Victorville, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Tahir Tellioglu's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Tahir Tellioglu accept?

Health plans from Anthem Blue Cross and Blue Shield, Harvard Pilgrim Health Care, Taro Health and WellSense Health Plan list Tahir Tellioglu 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 Tahir Tellioglu affiliated with any hospitals?

According to CMS data, Tahir Tellioglu is affiliated with Massachusetts General Hospital.

When was this NPI record last updated?

The NPPES record for Tahir Tellioglu was last updated on September 28, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 26 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.