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DR. THOMAS ANDREW ZARKA M.D.
NPI 1972587913
Obstetrics & Gynecology in Derry, NH

Active since December 02, 2005PECOS EnrolledAccepts Medicare Assignment
44 BIRCH ST, STE 200, DERRY, NH 03038(603) 421-2526(603) 421-2568 Get Directions Write a Review

NPPES record last updated: January 18, 2022. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jan 18, 2022, Jan 13, 2022, Feb 27, 2017 (3 updates tracked since 2017).

About Dr. Thomas Andrew Zarka M.d. NPPES

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

DR. THOMAS ANDREW ZARKA M.D. (NPI 1972587913) is an individual obstetrics & gynecology provider in Derry, New Hampshire, licensed in New Hampshire (12251) and active in the NPI registry since December 2005. He is enrolled in Medicare PECOS, is affiliated with Parkland Medical Center, and is a graduate of St. Louis College Of Physicians And Surgeons (1997).

NPPES Registry Identity

NPI1972587913
Entity TypeIndividualMale
Primary Taxonomy207V00000X
Provider Legal NameDR. THOMAS ANDREW ZARKACredential: M.D.
Location Address44 BIRCH ST, STE 200Derry, NH 03038-2752
Mailing Address44 Birch St, Ste 200Derry, NH 03038-2752 · (603) 421-2526 · Fax (603) 421-2568
Phone(603) 421-2526
Fax(603) 421-2568
Sole ProprietorNo
Medical School CMSSt. Louis College Of Physicians And SurgeonsGraduated 1997
Enumeration DateDecember 2, 2005
Last NPPES UpdateJanuary 18, 20223 updates tracked since enumeration
NPPES CertifiedJanuary 18, 2022
✔ NPI 1972587913 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in NH · 12251
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
44 BIRCH ST, Derry, NH 03038
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Other Identifiers 1

Medicaid3080793NH

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Sheld, Anthem Blue Cross and Blue Shield, Harvard Pilgrim Health Care.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. Thomas Andrew Zarka 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 ID1951203892
PECOS Enrollment IDI20040426001009
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 Zarka reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Parkland Physician Services, Inc.
Same address
Endocrinology, Diabetes & Metabolism
44 BIRCH ST, SUITE 200
Derry, NH 03038
  • Reassigned Medicare billing, New Hampshire enrollment
  • 23 clinicians in this Medicare group
NPI 1144388737 (603) 421-9130
Appledore Medical Group, Inc.
27 mi
Family Medicine
29 LAFAYETTE RD
North Hampton, NH 03862
  • Reassigned Medicare billing, New Hampshire enrollment
  • 185 clinicians in this Medicare group
NPI 1174512693 (603) 964-9370

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 3

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.

Cervical or vaginal cancer screening; pelvic and clinical breast examination G0101
This procedure involves checking for health issues in the lower abdomen and chest area. It helps identify early signs of certain conditions, increasing the chance for successful treatment. It's a routine check-up that's important for maintaining good health.
38 services38 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.
31 services21 patients
Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory Q0091
A Papanicolaou smear, often called a Pap smear, is a test to check for changes in cells. A small sample is gently collected from the lower region and sent to a lab for examination. This helps in early detection of potential health issues.
11 services11 patients

Hospital Affiliations CMS Care Compare

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

Parkland Medical Center

Acute Care Hospitals · Derry, NH
5/5 CMS rating
OwnershipProprietary
CMS Certification Number300017
Location1 Parkland DriveDerry, NH 03038 · Rockingham County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 03038 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
$132.09 typical visit price
range $57.75 – $174.26
Typical copayment $33.02 (range $14.43 – $43.56)
Most-billed visit code 99204
Established Patient
$71.85 typical visit price
range $18.70 – $142.15
Typical copayment $17.96 (range $4.67 – $35.53)
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 20

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

DR. KEITH D JORGENSEN M.D.
Otolaryngology
44 BIRCH ST, SUITE 304
DERRY, NH 03038
Rockingham County (603) 432-8104
COASTAL NEW HAMPSHIE NEUROSURGEONS
Neurological Surgery
44 BIRCH ST, SUITE 207
DERRY, NH 03038
Rockingham County (603) 433-4666
MARY JEAN UHRICH PA-C
Physician Assistant
44 BIRCH ST, SUITE 200
DERRY, NH 03038
Rockingham County (603) 421-9616
PARKLAND PHYSICIAN SERVICES INC
Family Medicine
44 BIRCH ST, SUITE 200
DERRY, NH 03038
Rockingham County (603) 421-2432
PARKLAND PHYSICIAN SERVICES, INC.
Internal Medicine (Endocrinology, Diabetes & Metabolism)
44 BIRCH ST, SUITE 200
DERRY, NH 03038
Rockingham County (603) 421-9130
PARKLAND PHYSICIAN SERVICES INC
Internal Medicine
44 BIRCH ST, SUITE 200
DERRY, NH 03038
Rockingham County (603) 421-3419
PARKLAND PHYSICIAN SERVICES INC
Internal Medicine (Medical Oncology)
44 BIRCH ST, SUITE 209
DERRY, NH 03038
Rockingham County (603) 421-2181
CORINNE M CHAAR RD CDE
Dietitian, Registered (Nutrition, Metabolic)
44 BIRCH ST, SUITE 200
DERRY, NH 03038
Rockingham County (603) 421-9616

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 Zarka's NPI number?

The NPI number for Thomas Zarka is 1972587913. It was assigned to this individual provider in the NPPES registry on December 2, 2005.

Where is Thomas Zarka located?

Thomas Zarka practices at 44 Birch St Ste 200, Derry, NH 03038. The listed phone number is (603) 421-2526.

What is Thomas Zarka's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Thomas Zarka enrolled in Medicare?

Yes. Thomas Zarka 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 Zarka's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Thomas Zarka reassigns Medicare benefits to 2 organizations: Parkland Physician Services, Inc. (Derry, NH) and Appledore Medical Group, Inc. (North Hampton, NH). 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 Zarka's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Thomas Zarka accept?

Health plans from Anthem Blue Cross and Blue Sheld, Anthem Blue Cross and Blue Shield and Harvard Pilgrim Health Care list Thomas Zarka 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 Thomas Zarka affiliated with any hospitals?

According to CMS data, Thomas Zarka is affiliated with Parkland Medical Center.

When was this NPI record last updated?

The NPPES record for Thomas Zarka was last updated on January 18, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.