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DR. THERESA A. HADLOCK M.D.
NPI 1578554549
Otolaryngology - Facial Plastic Surgery in Boston, MA

Active since October 31, 2005PECOS EnrolledAccepts Medicare Assignment
200 HIGH ST FL 5, BOSTON, MA 02110(617) 221-6909 Get Directions Write a Review

NPPES record last updated: May 29, 2025. Verified against the NPPES registry weekly; last sync: November 08, 2026.

About Dr. Theresa A. Hadlock M.d. NPPES

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

DR. THERESA A. HADLOCK M.D. (NPI 1578554549) is an individual facial plastic surgery provider in Boston, Massachusetts, licensed in Massachusetts (213813) and active in the NPI registry since October 2005. She is enrolled in Medicare PECOS, is affiliated with Massachusetts Eye And Ear Infirmary -, and is a graduate of Harvard Medical School (1994).

NPPES Registry Identity

NPI1578554549
Entity TypeIndividualFemale
Primary Taxonomy207YS0123X
Provider Legal NameDR. THERESA A. HADLOCKCredential: M.D.
Location Address200 HIGH ST FL 5Boston, MA 02110-3036
Mailing Address200 High St Fl 5Boston, MA 02110-3036 · (617) 221-6909
Phone(617) 221-6909
Sole ProprietorNo
Medical School CMSHarvard Medical SchoolGraduated 1994
Enumeration DateOctober 31, 2005
Last NPPES UpdateMay 29, 2025
NPPES CertifiedMay 29, 2025
✔ NPI 1578554549 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOtolaryngology · Facial Plastic SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code207YS0123X
License✔ Licensed in MA · 213813
Definition
An otolaryngologist who specializes in facial plastic surgery.
200 HIGH ST FL 5, Boston, MA 02110
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, WellSense Health Plan.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. Theresa A. Hadlock 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 ID5092900704
PECOS Enrollment IDI20101108000927
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 Reassignment

Medicare enrollment records show Theresa Hadlock reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Hadlock Center For Facial Plastic Surgery PC
Same address
Facial Plastic Surgery
200 HIGH ST
Boston, MA 02110
  • Reassigned Medicare billing, Massachusetts enrollment
  • 2 clinicians in this Medicare group
NPI 1104507854 (631) 998-3495

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 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.

Injection, onabotulinumtoxina, 1 unit J0585
Onabotulinumtoxina, also known as Botox, is a medication injected into muscles. It's used to treat various conditions by blocking nerve activity in the muscles, causing a temporary reduction in muscle activity. The units refer to the dosage.
15,427 services65 patients
Injection of chemical for paralysis of nerve muscles on side of face 64612
This procedure involves injecting a chemical into specific facial nerves, causing temporary muscle paralysis. It's used to treat conditions like facial spasms or wrinkles. The effects are usually temporary, requiring repeat treatments.
153 services65 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
27 services25 patients
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
20 services20 patients
Repair of wound by transferring skin, 30.1-60.0 sq cm 14301
This procedure involves repairing a wound by moving healthy skin from one area of the body to the wound site. The transferred skin, measuring between 30.1-60.0 square cm, aids in healing and reduces scarring.
17 services17 patients

Hospital Affiliations CMS Care Compare

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

Massachusetts Eye And Ear Infirmary -

Acute Care Hospitals · Boston, MA
OwnershipVoluntary non-profit - Private
CMS Certification Number220075
Location243 Charles StreetBoston, MA 02114 · Suffolk County
Emergency services

Other Providers at the Same Location NPPES

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

SIOBHAN BAXTER
Physician Assistant
200 HIGH ST FL 5
BOSTON, MA 02110
Suffolk County (617) 221-6909

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 Theresa Hadlock's NPI number?

The NPI number for Theresa Hadlock is 1578554549. It was assigned to this individual provider in the NPPES registry on October 31, 2005.

Where is Theresa Hadlock located?

Theresa Hadlock practices at 200 High St Fl 5, Boston, MA 02110. The listed phone number is (617) 221-6909.

What is Theresa Hadlock's specialty?

The primary specialty registered for this NPI is Otolaryngology, specializing in Facial Plastic Surgery, with taxonomy code 207YS0123X.

Is Theresa Hadlock enrolled in Medicare?

Yes. Theresa Hadlock 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 organization bills Medicare for Theresa Hadlock's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Theresa Hadlock reassigns Medicare benefits to Hadlock Center For Facial Plastic Surgery PC (Boston, MA). The 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 Theresa Hadlock's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Theresa Hadlock accept?

Health plans from Anthem Blue Cross and Blue Shield and WellSense Health Plan list Theresa Hadlock 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 Theresa Hadlock affiliated with any hospitals?

According to CMS data, Theresa Hadlock is affiliated with Massachusetts Eye And Ear Infirmary -.

When was this NPI record last updated?

The NPPES record for Theresa Hadlock was last updated on May 29, 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.