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DR. MONICA ANN WILLIAMS MD
NPI 1295932986
Anesthesiology - Pediatric Anesthesiology in Philadelphia, PA

Active since June 27, 2007PECOS Enrolled
3401 CIVIC CENTER BLVD, PHILADELPHIA, PA 19104(215) 590-1858 Get Directions Write a Review

NPPES record last updated: January 9, 2023. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Jan 9, 2023, Oct 7, 2021 (2 updates tracked since 2021).

About Dr. Monica Ann Williams Md NPPES

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

DR. MONICA ANN WILLIAMS MD (NPI 1295932986) is an individual pediatric anesthesiology provider in Philadelphia, Pennsylvania, licensed in Pennsylvania (MD474092) and active in the NPI registry since June 2007. She is enrolled in Medicare PECOS and maintains a secondary practice location in King Of Prussia.

NPPES Registry Identity

NPI1295932986
Entity TypeIndividualFemale
Primary Taxonomy207LP3000X
Provider Legal NameDR. MONICA ANN WILLIAMSCredential: MD
Location Address3401 CIVIC CENTER BLVDPhiladelphia, PA 19104-4319
Mailing Address3401 Civic Center BlvdPhiladelphia, PA 19104-4319 · (267) 425-9300 · Fax (267) 425-9331
Phone(215) 590-1858
Sole ProprietorNo
Enumeration DateJune 27, 2007
Last NPPES UpdateJanuary 9, 20232 updates tracked since enumeration
NPPES CertifiedJanuary 9, 2023
✔ NPI 1295932986 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiology · Pediatric AnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207LP3000X
License✔ Licensed in PA · MD474092
Definition
An anesthesiologist who has had additional skill and experience in and is primarily concerned with the anesthesia, sedation, and pain management needs of infants and children. A pediatric anesthesiologist generally provides services including the evaluation of complex medical problems in infants and children when surgery is necessary, planning and care for children before and after surgery, pain control, anesthesia and sedation for any procedures out of the operating room such as MRI, CT scan, and radiation therapy.
3401 CIVIC CENTER BLVD, Philadelphia, PA 19104
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Secondary Practice Location 1

Location 1550 S Goddard BlvdKing Of Prussia, PA 19406-2922 · Phone (610) 337-3232

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Monica Ann Williams Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Monica Williams reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Children's Anesthesiology Associates, Ltd
Same address
Pain Medicine
3401 CIVIC CENTER BLVD
Philadelphia, PA 19104
  • Reassigned Medicare billing, Pennsylvania enrollment
  • Medicare enrollment name: Childrens Anesthesiology Associates Ltd
  • 216 clinicians in this Medicare group
NPI 1215048491 (215) 590-1000

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 19104 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
$137.17 typical visit price
range $59.88 – $180.99
Typical copayment $34.29 (range $14.97 – $45.24)
Most-billed visit code 99204
Established Patient
$74.47 typical visit price
range $19.30 – $147.29
Typical copayment $18.61 (range $4.82 – $36.82)
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.

AARON DORFMAN M.D.
Pediatrics (Pediatric Cardiology)
3401 CIVIC CENTER BLVD, CHILDREN'S HOSPITAL OF PHILADELPHIA - CARDIOLOGY
PHILADELPHIA, PA 19104
Philadelphia County (215) 590-4040
MS. NICOLE MARIE KOEPKE CRNP
Nurse Practitioner (Pediatrics)
3401 CIVIC CENTER BLVD, CHILDREN'S HOSPITAL OF PHILADELPHIA - EMERGENCY MED
PHILADELPHIA, PA 19104
Philadelphia County (215) 590-1944
DR. CASSANDRA ALYS LIGH MD
Surgery (Plastic and Reconstructive Surgery)
3401 CIVIC CENTER BLVD
PHILADELPHIA, PA 19104
Philadelphia County (215) 590-2208
DR. PREETI SOI
Psychiatry & Neurology (Child & Adolescent Psychiatry)
3401 CIVIC CENTER BLVD
PHILADELPHIA, PA 19104
Philadelphia County (215) 590-7555
ROSALIND USHER M.D.
Pediatrics (Developmental - Behavioral Pediatrics)
3401 CIVIC CENTER BLVD, DIVISION OF DEVELOPMENTAL AND BEHAVIORAL PEDIATRICS
PHILADELPHIA, PA 19104
Philadelphia County (215) 590-6336
DR. MATTHEW DAVID SCHREIER MD
Pediatrics (Pediatric Cardiology)
3401 CIVIC CENTER BLVD
PHILADELPHIA, PA 19104
Philadelphia County (215) 590-1000
DR. TERRENCE CALDWELL JR. PHARMD
Pharmacist (Pediatrics)
3401 CIVIC CENTER BLVD
PHILADELPHIA, PA 19104
Philadelphia County (215) 590-1000
ALYSSA STIEFEL CRNP
Nurse Practitioner (Pediatrics)
3401 CIVIC CENTER BLVD
PHILADELPHIA, PA 19104
Philadelphia County (215) 590-1000

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 Monica Williams's NPI number?

The NPI number for Monica Williams is 1295932986. It was assigned to this individual provider in the NPPES registry on June 27, 2007.

Where is Monica Williams located?

Monica Williams practices at 3401 Civic Center Blvd, Philadelphia, PA 19104. The listed phone number is (215) 590-1858.

What is Monica Williams's specialty?

The primary specialty registered for this NPI is Anesthesiology, specializing in Pediatric Anesthesiology, with taxonomy code 207LP3000X.

Is Monica Williams enrolled in Medicare?

Yes. Monica Williams is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Monica Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Monica Williams reassigns Medicare benefits to Children's Anesthesiology Associates, Ltd (Philadelphia, PA). 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 Monica Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Monica Williams was last updated on January 9, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.