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DR. THOMAS R. WARREN II M.D.
NPI 1669458030
Surgery in Apo, AA

Active since December 19, 2005PECOS Enrolled
71.12/100
CMS Quality Rating
8901 WISCONSIN AVE, APO, AA 20889(301) 295-4000 Get Directions Write a Review

NPPES record last updated: April 27, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Apr 27, 2026, Jan 13, 2023 (2 updates tracked since 2023).

About Dr. Thomas R. Warren Ii M.d. NPPES

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

DR. THOMAS R. WARREN II M.D. (NPI 1669458030) is an individual surgery provider in Apo, AA, licensed in Texas (J8824) and active in the NPI registry since December 2005. He is enrolled in Medicare PECOS, is affiliated with St Joseph's Hospital Of Buckhannon, Inc, and is a graduate of Texas A & M University System, Hsc, College Of Medicine (1994).

NPPES Registry Identity

NPI1669458030
Entity TypeIndividualMale
Primary Taxonomy208600000X
Provider Legal NameDR. THOMAS R. WARREN IICredential: M.D.
Location Address8901 WISCONSIN AVEApo, AA 20889
Mailing Address8901 Wisconsin AveApo, AA 20889
Phone(301) 295-4000
Sole ProprietorNo
Medical School CMSTexas A & M University System, Hsc, College Of MedicineGraduated 1994
Enumeration DateDecember 19, 2005
Last NPPES UpdateApril 27, 20262 updates tracked since enumeration
NPPES CertifiedApril 27, 2026
✔ NPI 1669458030 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians
Taxonomy Code208600000X
License✔ Licensed in TX · J8824
Definition
A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.
Also ListedPsychiatry & Neurology · PsychiatryTaxonomy 2084P0800X · License J8824 (TX)
8901 WISCONSIN AVE, Apo, AA 20889
Open in Google Maps ↗

Other Identifiers 8

Other126446101TX · Firstcare Commercial
Other87792ZTX · Hmo Blue
Medicaid200038640AOK
Other201047880NM · Presbyterian Salud & Hmo
Other8P2631TX · Bc/bs
Medicaid126446102TX
Medicaid54338026NM
OtherA035NM · Triwest

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Aspirus Health Plan, Baylor Scott and White Health Plan, Blue Cross and Blue Shield of Texas 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 (PECOS)

Dr. Thomas R. Warren Ii M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID1658357132
PECOS Enrollment IDI20250312001580
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

5

Medicare enrollment records show Thomas Warren reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Divine Savior Healthcare, Inc.
717 mi
General Acute Care Hospital
2817 NEW PINERY RD
Portage, WI 53901
  • Reassigned Medicare billing, Wisconsin enrollment
  • 359 clinicians in this Medicare group
NPI 1124083894 (608) 742-4131
Aspirus Rhinelander & Tomahawk Hospitals & Clinics, Inc.
729 mi
Clinic/Center
205 S MAIN ST
Iola, WI 54945
  • Reassigned Medicare billing, Wisconsin enrollment
  • 935 clinicians in this Medicare group
NPI 1578232849 (715) 445-4801
Aspirus Stevens Point Hospital & Clinics, Inc.
746 mi
General Practice
3500 HOOVER RD
Stevens Point, WI 54481
  • Reassigned Medicare billing, Wisconsin enrollment
  • 619 clinicians in this Medicare group
NPI 1184082745 (715) 342-7900
Hendrick Provider Network
1,345 mi
Internal Medicine
1904 PINE ST, SUITE 200
Abilene, TX 79601
  • Reassigned Medicare billing, Texas enrollment
  • 420 clinicians in this Medicare group
NPI 1396961322 (325) 670-4220
Dhhs Phs Naihs Chinle Comprehensive Health Care Facility
1,767 mi
General Acute Care Hospital
NAVAJO ROUTE 64
Tsaile, AZ 86556
  • Reassigned Medicare billing, Texas enrollment
  • 476 clinicians in this Medicare group
NPI 1538185715 (928) 724-3600

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.

Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231
Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.
23 services11 patients
Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes 99221
Initial hospital inpatient care refers to the first day of your stay in the hospital. This service typically includes a 30-minute check-up with a healthcare professional. They'll assess your health, discuss your condition, and plan your treatment. It's part of ensuring you receive the best possible care.
17 services17 patients

Hospital Affiliations CMS Care Compare

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

St Joseph's Hospital Of Buckhannon, Inc

Critical Access Hospitals · Buckhannon, WV
OwnershipVoluntary non-profit - Private
CMS Certification Number511321
Location1 Amalia DriveBuckhannon, WV 26201 · Upshur County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 20889 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
$100.31 typical visit price
range $65.18 – $194.86
Typical copayment $25.07 (range $16.29 – $48.71)
Most-billed visit code 99203
Established Patient
$80.66 typical visit price
range $21.40 – $158.88
Typical copayment $20.16 (range $5.35 – $39.72)
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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

71.12/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality55.4
Promoting Interoperability100
Improvement Activities40
Cost48.33

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. TAMMERA NELSON
Pharmacist
8901 WISCONSIN AVE
BETHESDA, MD 20889
Montgomery County (301) 295-4497
DAWOOD TAFTI M.D.
Radiology (Diagnostic Radiology)
8901 WISCONSIN AVE
BETHESDA, MD 20889
Montgomery County (301) 319-8373
DR. ASHLEY BEE BOZZAY
Student in an Organized Health Care Education/Training Program
8901 WISCONSIN AVE
BETHESDA, MD 20889
Montgomery County (301) 295-8588
DR. ADAM JOSEPH MAIER DO
Internal Medicine (Infectious Disease)
8901 WISCONSIN AVE
BETHESDA, MD 20889
Montgomery County (301) 295-4000
SIMAL RUHISHTA ALI DO
General Practice
8901 WISCONSIN AVE
BETHESDA, MD 20889
Montgomery County (301) 295-4900
DR. JACOB L FRIESEN M.D.
Psychiatry & Neurology (Psychiatry)
8901 WISCONSIN AVE, WRNMMC, NICOE, BUILDING 51
BETHESDA, MD 20889
Montgomery County (301) 319-3772
MS. CARLA PATRICE ALEXIS P.T.
Physical Therapist
8901 WISCONSIN AVE
BETHESDA, MD 20889
Montgomery County (301) 295-4880
DR. ANN TALBOT SCHWARTZ MD
Pediatrics
8901 WISCONSIN AVE
BETHESDA, MD 20889
Montgomery County (301) 295-4941

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 Warren's NPI number?

The NPI number for Thomas Warren is 1669458030. It was assigned to this individual provider in the NPPES registry on December 19, 2005.

Where is Thomas Warren located?

Thomas Warren practices at 8901 Wisconsin Ave, Apo, AA 20889. The listed phone number is (301) 295-4000.

What is Thomas Warren's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Is Thomas Warren enrolled in Medicare?

Yes. Thomas Warren is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Thomas Warren's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Thomas Warren reassigns Medicare benefits to 5 organizations: Divine Savior Healthcare, Inc. (Portage, WI), Aspirus Rhinelander & Tomahawk Hospitals & Clinics, Inc. (Iola, WI), Aspirus Stevens Point Hospital & Clinics, Inc. (Stevens Point, WI), Hendrick Provider Network (Abilene, TX) and Dhhs Phs Naihs Chinle Comprehensive Health Care Facility (Tsaile, AZ). 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 Warren's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Thomas Warren accept?

Health plans from Aspirus Health Plan, Baylor Scott and White Health Plan, Blue Cross and Blue Shield of Texas and Cigna Healthcare list Thomas Warren 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 Warren affiliated with any hospitals?

According to CMS data, Thomas Warren is affiliated with St Joseph's Hospital Of Buckhannon, Inc.

When was this NPI record last updated?

The NPPES record for Thomas Warren was last updated on April 27, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.