DR. PETER MAAG WILLIAMS M.D.
NPI 1093827214
Radiology - Diagnostic Radiology in Jbsa - Lackland, TX

Q: What is Peter Williams's NPI number?

The NPI number for Peter Williams is 1093827214. It was assigned to this individual provider in the NPPES registry on September 1, 2006.

Q: What is Peter Williams's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Q: When was this NPI record last updated?

The NPPES record for Peter Williams was last updated on February 26, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.

Active since September 01, 2006PECOS EnrolledAccepts Medicare Assignment

83.13/100

CMS Quality Rating

1100 WILFORD HALL LOOP, BLDG 4554, 59MDW/SGHC, JBSA - LACKLAND, TX 78236(210) 292-5256 Get Directions Write a Review

NPPES record last updated: February 26, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Mar 31, 2023, Sep 12, 2019, Jul 1, 2019 (3 updates tracked since 2019).

On this page

About Dr. Peter Maag Williams M.d. NPPES

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

DR. PETER MAAG WILLIAMS M.D. (NPI 1093827214) is an individual diagnostic radiology provider in Jbsa - Lackland, Texas, licensed in Pennsylvania (MD448897) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS, is affiliated with Sacred Heart Hospital, and is a graduate of Uniformed Services Uhs Fe Hebert School Of Med (2004).

NPPES Registry Identity

NPI1093827214

Entity TypeIndividualMale

Primary Taxonomy2085R0202X

Provider Legal NameDR. PETER MAAG WILLIAMSCredential: M.D.

Location Address1100 WILFORD HALL LOOP, BLDG 4554, 59MDW/SGHCJbsa - Lackland, TX 78236

Mailing Address300 E Basse Rd Apt 1403San Antonio, TX 78209-8388

Phone(210) 292-5256

Sole ProprietorNo

Medical School CMSUniformed Services Uhs Fe Hebert School Of MedGraduated 2004

Enumeration DateSeptember 1, 2006

Last NPPES UpdateFebruary 26, 20263 updates tracked since enumeration

NPPES CertifiedFebruary 26, 2026

✔ NPI 1093827214 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · Diagnostic RadiologyAllopathic & Osteopathic Physicians

Taxonomy Code2085R0202X

Licenses✔ Licensed in PA · MD448897✔ Licensed in IL · 036172839

Definition

A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.

1100 WILFORD HALL LOOP, BLDG 4554, Jbsa - Lackland, TX 78236

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Care Network of Michigan, Blue Cross and Blue Shield of Texas, CareSource (Common Ground Healthcare) and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Peter Maag Williams 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 ID1456587005

PECOS Enrollment IDI20220510001043, I20240816001666, I20250321002013, I20250827002619, I20260126000079

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.

Areas of Expertise CMS Part B claims 24

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.

X-ray of chest, 1 view 71045

A chest X-ray, 1 view, is a quick, painless test that produces images of the structures within your chest, such as your heart, lungs, and blood vessels. It helps in diagnosing conditions like pneumonia, heart problems, or lung cancer. You'll stand in front of a machine that emits X-rays, which pass through your body to create the image.

441 services425 patients

Ct scan head or brain without contrast 70450

A CT scan of the head or brain without contrast is a non-invasive imaging procedure. It uses X-rays to create detailed pictures of your brain, skull, and other structures inside your head. It helps to detect conditions like strokes, tumors, or injuries. No dye (contrast) is used in this test.

306 services302 patients

Ct scan of abdomen and pelvis with contrast 74177

A CT scan of the abdomen and pelvis with contrast is an imaging procedure. A special dye, called contrast, is used to make certain areas more visible. This can help identify issues such as infections, tumors, or other abnormalities. The procedure is painless and usually takes about 30 minutes.

159 services158 patients

Ct scan of abdomen and pelvis without contrast 74176

A CT scan of the abdomen and pelvis is a non-invasive medical test. It uses special X-ray equipment to create detailed images of your abdominal and pelvic areas. This helps doctors examine organs, tissues, and vessels. No contrast dye is used in this procedure.

112 services111 patients

Ct scan of upper spine without contrast 72125

A CT scan of the upper spine without contrast is a non-invasive imaging test that uses X-rays to capture detailed images of your neck and upper back. It helps in identifying issues like fractures, tumors, or infections. No dye (contrast) is used in this scan.

105 services105 patients

X-ray of chest, 2 views 71046

A chest X-ray, 2 views, is a quick, painless test that creates pictures of the structures inside your chest, such as your heart, lungs, and blood vessels. Two different angles are used to get a comprehensive view. This helps in diagnosing conditions like pneumonia, heart problems, or lung cancer.

67 services67 patients

Ct scan of chest without contrast 71250

A CT scan of the chest without contrast is a non-invasive imaging procedure. It uses special X-ray equipment to produce detailed images of your chest area, including your lungs and heart. It can help diagnose conditions such as lung diseases or heart disorders. It doesn't involve any dyes or contrast agents.

66 services66 patients

Ct scan of blood vessels of chest with contrast 71275

A CT scan of the chest with contrast is a non-invasive imaging test. It uses X-rays and a special dye to get detailed images of your blood vessels in the chest. This helps in diagnosing conditions related to heart and lungs.

58 services58 patients

Ct scan of blood vessels of head with contrast 70496

A CT scan of the head's blood vessels with contrast is a diagnostic procedure. A special dye (contrast) is injected into your body to make the blood vessels visible on the scan. This helps identify issues like blockages or abnormalities in your head's blood vessels.

35 services35 patients

Ct scan of face without contrast 70486

A CT scan of the face without contrast is a non-invasive imaging procedure. It uses X-rays to create detailed pictures of your face, including bones, soft tissues, and blood vessels. It's often used to diagnose diseases, injuries, or abnormalities. No contrast dye is used in this procedure.

32 services32 patients

Ct scan of blood vessels of neck with contrast 70498

A CT scan of the neck's blood vessels with contrast is a diagnostic procedure. It uses X-rays and a special dye to create detailed images of your neck's blood vessels. This helps doctors detect issues such as blockages or abnormalities.

32 services32 patients

X-ray of shoulder, minimum of 2 views 73030

An X-ray of the shoulder, with a minimum of 2 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of your shoulder bones. This helps in diagnosing conditions like fractures, arthritis, or other abnormalities. The procedure is quick and painless.

28 services28 patients

X-ray of abdomen, 1 view 74018

An X-ray of the abdomen, 1 view, is a quick and painless imaging test. It uses a small amount of radiation to produce images of the structures in your abdomen, such as the stomach, liver, and intestines. This can help identify issues like blockages, infections, or injuries.

25 services20 patients

Ct scan of lower spine without contrast 72131

A CT scan of the lower spine without contrast is a non-invasive imaging test. It uses X-rays to create detailed images of your lower back area, helping to detect conditions like fractures, infections, or tumors. It's painless and generally quick.

23 services23 patients

Ct scan of chest with contrast 71260

A CT scan of the chest with contrast is an imaging procedure. A special dye (contrast) is used to highlight specific areas in your body, providing clearer pictures of your chest. This helps in diagnosing conditions related to your lungs, heart, and other chest structures.

22 services22 patients

Mri scan of brain without contrast 70551

An MRI scan of the brain without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to create detailed images of your brain. It helps in detecting abnormalities like tumors, stroke, inflammation, or infection.

21 services21 patients

Limited ultrasound scan of abdomen 76705

A limited ultrasound scan of the abdomen is a non-invasive imaging test. It uses sound waves to produce images of the abdominal organs such as the liver, gallbladder, spleen, pancreas, and kidneys. This helps to identify any abnormalities or issues.

21 services21 patients

Ultrasound study of arm or leg veins with compression and maneuvers 93970

An ultrasound study of arm or leg veins with compression and maneuvers is a non-invasive procedure that uses sound waves to create images of your veins. This helps identify blood clots or other vein problems. During the procedure, pressure is applied to the veins and certain movements are performed to assess blood flow.

20 services20 patients

X-ray of hip, 2-3 views 73502

An X-ray of the hip with 2-3 views is a non-invasive imaging test. It uses a small amount of radiation to produce pictures of the hip joint. These images help in diagnosing conditions like fractures, arthritis, or other abnormalities. The process is quick and painless.

18 services18 patients

Limited ultrasound scan behind abdominal cavity 76775

A limited ultrasound scan behind the abdominal cavity is a non-invasive imaging method that helps visualize structures in the back of your abdomen. This procedure uses sound waves to create pictures of these areas, assisting in diagnosing certain conditions.

18 services18 patients

X-ray of knee, 3 views 73562

An X-ray of the knee, 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the knee from three different angles. This helps medical professionals to diagnose and monitor conditions like arthritis, fractures, or infections. The process is quick and painless.

15 services13 patients

Ultrasound study of one arm or leg veins with compression and maneuvers 93971

This is a non-invasive procedure using sound waves to visualize veins in an arm or leg. It involves applying gentle pressure and performing certain movements. It helps identify any abnormal blood flow or clots, ensuring vascular health.

15 services15 patients

X-ray of foot, minimum of 3 views 73630

An X-ray of the foot, minimum of 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the bones and tissues in your foot. This helps to identify fractures, infections, or other abnormalities. Multiple views ensure a comprehensive examination.

13 services13 patients

X-ray of knee, 4 or more views 73564

An X-ray of the knee, 4 or more views, is a non-invasive imaging test. It involves capturing multiple images of your knee from different angles. This helps in diagnosing conditions such as fractures, arthritis, or infections. The procedure is quick and painless.

11 services11 patients

Hospital Affiliations CMS Care Compare 5

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

Sacred Heart Hospital

Acute Care Hospitals · Pensacola, FL

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number100025

Location5151 N 9th AvePensacola, FL 32504 · Escambia County

Emergency services Birthing friendly

Hca Florida Twin Cities Hospital

Acute Care Hospitals · Niceville, FL

4/5 CMS rating

OwnershipProprietary

CMS Certification Number100054

Location2190 Hwy 85 NNiceville, FL 32578 · Okaloosa County

Emergency services

North Okaloosa Medical Center

Acute Care Hospitals · Crestview, FL

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number100122

Location151 Redstone Ave SECrestview, FL 32539 · Okaloosa County

Emergency services Birthing friendly

Santa Rosa Medical Center

Acute Care Hospitals · Milton, FL

4/5 CMS rating

OwnershipProprietary

CMS Certification Number100124

Location6002 Berryhill RdMilton, FL 32570 · Santa Rosa County

Emergency services Birthing friendly

Ascension St Vincent Hospital

Acute Care Hospitals · Indianapolis, IN

4/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number150084

Location2001 W 86th StIndianapolis, IN 46260 · Marion County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 78236 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

$84.92 typical visit price

range $54.84 – $166.88

Typical copayment $21.23 (range $13.71 – $41.72)

Most-billed visit code 99203

Established Patient

$68.55 typical visit price

range $17.52 – $136.11

Typical copayment $17.13 (range $4.38 – $34.02)

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.

83.13/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

80.16

Improvement Activities

Reported Quality Measures

Radiation Consideration for Adult CT: Utilization of Dose Lowering Techniques

Percentage of final reports for patients aged 18 years and older undergoing CT with documentation that one or more of the following dose reduction techniques were used: - Automated exposure control - Adjustment of the mA and/or kV according to patient size -…

100%21 patients

Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

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. DAVID LYNN WELLS D.D.S., M.S.

Dentist (Oral and Maxillofacial Pathology)

1100 WILFORD HALL LOOP, BLDG 4554, ATTN: 59 MDW/SGHC
JBSA LACKLAND, TX 78236

Bexar County (210) 292-6225

DEBORAH ANNE CLEARY CRNA

Nurse Anesthetist, Certified Registered

1100 WILFORD HALL LOOP, BLDG 4554, ATTN: 59 MDW/SGHC
JBSA LACKLAND, TX 78236

Bexar County (210) 542-7563

DR. ANN STEPHANIE HRYSHKO-MULLEN PH.D.

Psychologist (Health Service)

1100 WILFORD HALL LOOP, BLDG 4554, ATTN CREDENTIALS (CMC)
JBSA-LACKLAND, TX 78236

Bexar County (210) 292-5968

DR. MARIO GEORGE NICOLAS PH.D

Psychologist

1100 WILFORD HALL LOOP, BLDG 4554, ATTN: 59 MDW/SGHC
JBSA LACKLAND, TX 78236

Bexar County (210) 292-6225

DR. JANE SUEKO WALLACE DDS

Dentist (General Practice)

1100 WILFORD HALL LOOP, BLDG 4554, ATTN: 59 MDW/SGHC
JBSA LACKLAND, TX 78236

Bexar County (210) 292-6225

DR. KEVIN FLUCKIGER DPM

Podiatrist (Foot & Ankle Surgery)

1100 WILFORD HALL LOOP, BLDG 4554, ATTN: 59 MDW/SGHC
JBSA LACKLAND, TX 78236

Bexar County (210) 292-6225

DR. MARY A WEBB PA-C

Physician Assistant (Medical)

1100 WILFORD HALL LOOP, BLDG 4554, ATTN: 59 MDW/SGHC
JBSA LACKLAND, TX 78236

Bexar County (210) 565-4112

MRS. SUZANNE B. STINSON M.A., CCC-SP

Speech-Language Pathologist

1100 WILFORD HALL LOOP, BLDG 4554, ATTN: 59 MDW/SGHC
JBSA LACKLAND, TX 78236

Bexar County (210) 292-2665

DR. TOM JOSEPH SAUERWEIN M.D.

Internal Medicine (Endocrinology, Diabetes & Metabolism)

1100 WILFORD HALL LOOP, BLDG 4554, ATTN: 59 MDW/SGHC
JBSA LACKLAND, TX 78236

Bexar County (210) 292-6225

DR. SAMANDA BRYANT HAGAN PHD, LCSW, MDIV

Social Worker (Clinical)

1100 WILFORD HALL LOOP, BLDG 4554, ATTN: 59 MDW/SGHC
JBSA LACKLAND, TX 78236

Bexar County (210) 292-6225

DR. ERIC L CATHEY DDS

Dentist

1100 WILFORD HALL LOOP, BLDG 4554, ATTN: 59 MDW/SGHC
JBSA LACKLAND, TX 78236

Bexar County (210) 395-9896

MS. BETH MARY BAYKAN NURSE PRACTITIONER

Nurse Practitioner (Women's Health)

1100 WILFORD HALL LOOP, BLDG 4554, ATTN: 59 MDW/SGHC
JBSA LACKLAND, TX 78236

Bexar County (210) 292-6225

MIRIAM FRIEDMAN M.D.

Ophthalmology

1100 WILFORD HALL LOOP, BLDG 4554, OPHTHALMOLOGY CLINIC
JBSA LACKLAND, TX 78236

Bexar County (210) 292-6030

JENNY PHUNG STEVENS DMD

Dentist (Prosthodontics)

1100 WILFORD HALL LOOP, BLDG 4554, 59 MDW/SGHC
JBSA LACKLAND, TX 78236

Bexar County (210) 292-6225

DR. SHAWN MARIE GARCIA M.D.

Preventive Medicine (Public Health & General Preventive Medicine)

1100 WILFORD HALL LOOP, BLDG 4554, ATTN: 59 MDW/SGHC
SAN ANTONIO, TX 78236

Bexar County (210) 292-6225

MISS NADIA S REGIS NP

Nurse Practitioner (Women's Health)

1100 WILFORD HALL LOOP, BLDG 4554, ATTN: 59MDW/SGHC
JBSA LACKLAND, TX 78236

Bexar County (210) 292-6116

DR. CADE ADAM SALMON DDS, MS

Dentist (Prosthodontics)

1100 WILFORD HALL LOOP, BLDG 4554, ATTN: 59 MDW/SGHC
JBSA LACKLAND, TX 78236

Bexar County (210) 292-6225

DR. BRIAN YOUNG PT, DSC

Physical Therapist (Orthopedic)

1100 WILFORD HALL LOOP, BLDG 4554, 59 MDW/SGHC
JBSA LACKLAND, TX 78236

Bexar County (210) 292-6225

DR. KRISTEN BENAE NICHOLS D.D.S.

Dentist (Prosthodontics)

1100 WILFORD HALL LOOP, BLDG 4554, ATTN: 59 MDW/SGHC
JBSA LACKLAND, TX 78236

Bexar County (210) 292-0768

DR. KARA M VAN DE KIEFT M.D.

Radiology (Diagnostic Radiology)

1100 WILFORD HALL LOOP, BLDG 4554, ATTN: 59 MDW/SGHC
JBSA LACKLAND, TX 78236

Bexar County (210) 292-6225

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 Peter Williams's NPI number?

The NPI number for Peter Williams is 1093827214. It was assigned to this individual provider in the NPPES registry on September 1, 2006.

Where is Peter Williams located?

Peter Williams practices at 1100 Wilford Hall Loop, Bldg 4554 59mdw/Sghc, Jbsa - Lackland, TX 78236. The listed phone number is (210) 292-5256.

What is Peter Williams's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Is Peter Williams enrolled in Medicare?

Yes. Peter Williams 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.

What insurance does Peter Williams accept?

Health plans from Blue Care Network of Michigan, Blue Cross and Blue Shield of Texas, CareSource (Common Ground Healthcare), Oscar Health Maintenance Organization of Florida and Oscar Insurance Company and 2 other insurers list Peter Williams 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 Peter Williams affiliated with any hospitals?

According to CMS data, Peter Williams is affiliated with Sacred Heart Hospital, Hca Florida Twin Cities Hospital, North Okaloosa Medical Center, Santa Rosa Medical Center and Ascension St Vincent Hospital.

When was this NPI record last updated?

The NPPES record for Peter Williams was last updated on February 26, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.