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DR. THOMAS A DIAKUN M.D.
NPI 1679668305
Anesthesiology in Buffalo, NY

Active since October 04, 2006PECOS EnrolledAccepts Medicare Assignment
2121 MAIN STREET, SUITE 209, BUFFALO, NY 14214(716) 836-7510(716) 836-7511 Get Directions Write a Review

NPPES record last updated: December 23, 2011. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Thomas A Diakun M.d. NPPES

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

DR. THOMAS A DIAKUN M.D. (NPI 1679668305) is an individual anesthesiology provider in Buffalo, New York, licensed in New York (169375-1) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS, is affiliated with Sisters Of Charity Hospital, and is a graduate of State University Of New York At Buffalo School Of Medicine (1983).

NPPES Registry Identity

NPI1679668305
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameDR. THOMAS A DIAKUNCredential: M.D.
Location Address2121 MAIN STREET, SUITE 209Buffalo, NY 14214
Mailing Address2121 Main St, Suite 209Buffalo, NY 14214-2693 · (716) 836-7510 · Fax (716) 836-7511
Phone(716) 836-7510
Fax(716) 836-7511
Sole ProprietorYes
Medical School CMSState University Of New York At Buffalo School Of MedicineGraduated 1983
Enumeration DateOctober 4, 2006
Last NPPES UpdateDecember 23, 2011
✔ NPI 1679668305 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in NY · 169375-1
Definition
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
2121 MAIN STREET, Buffalo, NY 14214
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Other Identifiers 3

Medicaid01042722NY
Medicare UPINF56227NY
Medicare ID-Type UnspecifiedCC5283NY

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. Thomas A Diakun 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 ID5395931117
PECOS Enrollment IDI20121129000166
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

2

Medicare enrollment records show Thomas Diakun reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Parkside Medical Anesthesia Associates
0.2 mi
Anesthesiology
2157 MAIN STREET
Buffalo, NY 14214
  • Reassigned Medicare billing, New York enrollment
  • 117 clinicians in this Medicare group
NPI 1871537464 (716) 836-7510
Abbott Anesthesiologist Associates PC
5.9 mi
Specialist
565 ABBOTT RD
Buffalo, NY 14220
  • Reassigned Medicare billing, New York enrollment
  • 40 clinicians in this Medicare group
NPI 1902025513 (716) 826-6628

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

Hospital Affiliations CMS Care Compare

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

Sisters Of Charity Hospital

Acute Care Hospitals · Buffalo, NY
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number330078
Location2157 Main StreetBuffalo, NY 14214 · Erie County
Emergency services Birthing friendly

Other Providers at the Same Location NPPES 5

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

PAUL M ANAIN MD
Surgery (Vascular Surgery)
2121 MAIN STREET, SUITE 316
BUFFALO, NY 14214
Erie County (716) 837-2400
DR. GREGORY THOMAS CLABEAUX DO
Surgery (Vascular Surgery)
2121 MAIN STREET, SUITE 316
BUFFALO, NY 14214
Erie County (716) 837-2400
JOSEPH M ANAIN SR. M.D.
Surgery (Vascular Surgery)
2121 MAIN STREET, SUITE 316
BUFFALO, NY 14214
Erie County (716) 837-2400
MR. LAWRENCE A ROSEN DDS
Dentist
2121 MAIN STREET, SUITE 202
BUFFALO, NY 14214
Erie County (716) 835-1933
FAMILY DENTAL ASSOCIATES
Dentist (General Practice)
2121 MAIN STREET, SUITE 202
BUFFALO, NY 14214
Erie County (716) 835-1933

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 Thomas Diakun's NPI number?

The NPI number for Thomas Diakun is 1679668305. It was assigned to this individual provider in the NPPES registry on October 4, 2006.

Where is Thomas Diakun located?

Thomas Diakun practices at 2121 Main Street Suite 209, Buffalo, NY 14214. The listed phone number is (716) 836-7510.

What is Thomas Diakun's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is Thomas Diakun enrolled in Medicare?

Yes. Thomas Diakun 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 Thomas Diakun's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Thomas Diakun reassigns Medicare benefits to 2 organizations: Parkside Medical Anesthesia Associates (Buffalo, NY) and Abbott Anesthesiologist Associates PC (Buffalo, NY). 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 Thomas Diakun's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Thomas Diakun affiliated with any hospitals?

According to CMS data, Thomas Diakun is affiliated with Sisters Of Charity Hospital.

When was this NPI record last updated?

The NPPES record for Thomas Diakun was last updated on December 23, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.