MR. ALLISTER R. WILLIAMS M.D.
NPI 1639258205
Orthopaedic Surgery in East Stroudsburg, PA

Q: What is Allister Williams's NPI number?

The NPI number for Allister Williams is 1639258205. It was assigned to this individual provider in the NPPES registry on November 3, 2006.

Q: What is Allister Williams's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.

Q: When was this NPI record last updated?

The NPPES record for Allister Williams was last updated on October 14, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.

Active since November 03, 2006PECOS EnrolledAccepts Medicare Assignment

79.36/100

CMS Quality Rating

600 PLAZA CT STE C, EAST STROUDSBURG, PA 18301(570) 421-7020(570) 421-7091 Get Directions Write a Review

NPPES record last updated: October 14, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

On this page

About Mr. Allister R. Williams M.d. NPPES

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

MR. ALLISTER R. WILLIAMS M.D. (NPI 1639258205) is an individual orthopaedic surgery provider in East Stroudsburg, Pennsylvania, licensed in Pennsylvania (MD433510) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS, is affiliated with Bon Secours Community Hospital, and maintains 3 additional practice locations.

NPPES Registry Identity

NPI1639258205

Entity TypeIndividualMale

Primary Taxonomy207X00000X

Provider Legal NameMR. ALLISTER R. WILLIAMSCredential: M.D.

Location Address600 PLAZA CT STE CEast Stroudsburg, PA 18301-8263

Mailing Address600 Plaza Ct Ste CEast Stroudsburg, PA 18301-8263 · (570) 421-7020 · Fax (570) 421-7091

Phone(570) 421-7020

Fax(570) 421-7091

Sole ProprietorNo

Medical School CMSCollege Of Medicine And SurgeryGraduated 2002

Enumeration DateNovember 3, 2006

Last NPPES UpdateOctober 14, 2025

NPPES CertifiedOctober 14, 2025

✔ NPI 1639258205 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOrthopaedic SurgeryAllopathic & Osteopathic Physicians

Taxonomy Code207X00000X

Licenses✔ Licensed in PA · MD433510✔ Licensed in SC · LL24193

Definition

An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.

600 PLAZA CT STE C, East Stroudsburg, PA 18301

Open in Google Maps ↗

Secondary Practice Locations 3

Location 1120 Burrus Blvd Ste 120Brodheadsville, PA 18322-7812 · Phone (570) 421-7020 · Fax (570) 421-7091

Location 2100 Wheatfield Dr Ste 2Milford, PA 18337-7699 · Phone (570) 421-7020 · Fax (570) 421-7091

Location 3100 Community Dr Ste 210Tobyhanna, PA 18466-8987 · Phone (570) 421-7020 · Fax (570) 421-7091

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

Mr. Allister R. 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 ID9032287834

PECOS Enrollment IDI20081007000290, I20250411002904

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

Mountain Valley Orthopedics, P.C.

Same address

Orthopaedic Surgery

600 PLAZA CT, SUITE C
East Stroudsburg, PA 18301

Reassigned Medicare billing, New York and Pennsylvania enrollments
Medicare enrollment name: Mountain Valley Orthopedics PC

NPI 1538226519 (570) 421-7020

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 22

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.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

541 services329 patients

X-ray of pelvis, 1-2 views 72170

An X-ray of the pelvis, 1-2 views, is a quick and painless imaging test. It uses a small amount of radiation to produce images of the lower part of your torso. These images help to detect any abnormalities or injuries in your hip bones and surrounding structures.

139 services139 patients

X-ray of lower and sacral spine, minimum of 4 views 72110

An X-ray of the lower and sacral spine involves capturing images of your lower back and tailbone area. It helps in identifying issues like fractures, arthritis, or other abnormalities. At least four different angles or 'views' are taken to get a comprehensive picture.

130 services129 patients

Mri scan of lower spinal canal without contrast 72148

An MRI scan of the lower spinal canal without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to produce detailed images of your lower spine. This helps identify issues like disc problems, tumors, or nerve conditions. No dye is used.

104 services103 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.

101 services86 patients

Injection of anesthetic or steroid into joint between lower spine and hip bone using imaging guidance 27096

This procedure involves injecting medicine into the joint where your lower spine meets your hip bone. Using special imaging technology, the doctor ensures the medicine is delivered accurately. This can help reduce pain and inflammation in that area.

93 services71 patients

X-ray of lower and sacral spine, 2-3 views 72100

An X-ray of the lower and sacral spine involves capturing images of your lower back area, including the tailbone. This procedure helps in identifying problems like fractures, infections, or deformities. 2-3 different angle views provide a comprehensive picture.

89 services66 patients

Injection, methylprednisolone acetate, 40 mg J1030

Methylprednisolone acetate is a medication given through an injection. It's a type of corticosteroid, which reduces inflammation and immune responses. It can be used to treat various conditions like arthritis, allergies, and skin diseases. This dose is 40 mg.

63 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.

60 services60 patients

Injection of lower or sacral spine facet joint using imaging guidance, single level 64493

This procedure involves injecting medication into the facet joint in your lower back or sacral spine. It's done under imaging guidance to ensure accuracy. The aim is to alleviate pain and inflammation. It's a safe, often effective method for managing spinal discomfort.

59 services45 patients

Injection of lower or sacral spine facet joint using imaging guidance, second level 64494

This procedure involves injecting medication into the facet joints of your lower or sacral spine to manage pain. Imaging guidance ensures accurate placement. It's the second level, meaning it's done on two different joint levels.

53 services40 patients

Aspiration and/or injection of fluid from large joint 20610

This procedure involves using a needle to remove (aspiration) or introduce (injection) fluid into a large joint like the knee or hip. It can help diagnose conditions, relieve discomfort, or deliver medication directly to the joint.

41 services34 patients

X-ray of upper spine, 2-3 views 72040

An X-ray of the upper spine, with 2-3 views, is a painless procedure that employs a small amount of radiation to capture images of your neck and upper back. It assists in diagnosing conditions like arthritis, fractures, or spinal deformities.

36 services35 patients

Imaging guidance for procedure, 60 minutes or less 76000

Imaging guidance is a procedure where real-time images are used to direct medical tools during a treatment. This technique helps to improve accuracy and safety. The procedure typically lasts 60 minutes or less.

32 services32 patients

Partial removal of spine bone with release of spinal cord and/or nerves, each additional segment 63048

This procedure involves the partial removal of a bone in your spine to alleviate pressure on your spinal cord or nerves. It may be performed on multiple spine segments depending on your condition. The aim is to improve mobility and reduce pain or discomfort.

29 services22 patients

Aspiration and/or injection of fluid large joint using ultrasound guidance 20611

This procedure involves using ultrasound technology to accurately locate a large joint, usually the knee or shoulder. A needle is then inserted to either extract fluid (aspiration) or inject medication. The ultrasound helps ensure precision and safety.

24 services22 patients

Partial removal of spine bone with release of lower spinal cord and/or nerves, 1 segment 63047

This procedure involves removing part of a spine bone to alleviate pressure on the lower spinal cord and/or nerves. It targets a single segment of the spine, improving mobility and reducing pain. It's a common treatment for conditions like herniated discs or spinal stenosis.

22 services22 patients

X-ray of middle spine, 2 views 72070

An X-ray of the middle spine, or thoracic spine, involves capturing two different images of the area. This non-invasive procedure uses small amounts of radiation to visualize the bones and tissues in your back, helping to identify any abnormalities or injuries.

19 services19 patients

Mri scan of upper spinal canal without contrast 72141

An MRI scan of the upper spinal canal without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to create detailed images of your upper spine. This helps doctors identify issues such as injuries, infections or diseases. No dye is used.

19 services19 patients

Mri scan of leg joint without contrast 73721

An MRI scan of your leg joint is a non-invasive procedure that uses magnetic fields and radio waves to create detailed images of the structures within your leg. This helps doctors diagnose or monitor conditions without using contrast dye.

15 services14 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.

14 services11 patients

Fusion of spine in lower back 22612

Fusion of the spine in the lower back, also known as lumbar spinal fusion, is a surgery aimed to join, or fuse, two or more vertebrae in your lower back. This procedure can help alleviate pain and improve stability by reducing movement between the vertebrae.

12 services12 patients

Hospital Affiliations CMS Care Compare 5

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

Bon Secours Community Hospital

Acute Care Hospitals · Port Jervis, NY

3/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number330135

Location160 East Main StreetPort Jervis, NY 12771 · Orange County

Emergency services

Lehigh Valley Hospital

Acute Care Hospitals · Allentown, PA

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number390133

Location1200 South Cedar Crest BoulevardAllentown, PA 18103 · Lehigh County

Emergency services Birthing friendly

St Luke's Miners Memorial Hospital

Acute Care Hospitals · Coaldale, PA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number390183

Location360 W Ruddle StreetCoaldale, PA 18218 · Schuylkill County

Emergency services

Lehigh Valley Hospital - Pocono

Acute Care Hospitals · East Stroudsburg, PA

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number390201

Location206 East Brown StreetEast Stroudsburg, PA 18301 · Monroe County

Emergency services Birthing friendly

St Luke's Hospital - Monroe Campus

Acute Care Hospitals · Stroudsburg, PA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number390330

Location100 St Luke's LaneStroudsburg, PA 18360 · Monroe County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 18301 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

$84.88 typical visit price

range $54.64 – $166.87

Typical copayment $21.22 (range $13.66 – $41.71)

Most-billed visit code 99203

Established Patient

$68.36 typical visit price

range $17.33 – $135.84

Typical copayment $17.09 (range $4.33 – $33.96)

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.

79.36/100

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

Individually scored

Quality

65.93

Promoting Interoperability

100

Improvement Activities

Cost

65.28

Reported Quality Measures

Closing the Referral Loop: Receipt of Specialist Report

68%625 patients4/55-star benchmark: 87%

Controlling High Blood Pressure

27%98 patients2/55-star benchmark: 91%

Diabetes: Hemoglobin A1c (HbA1c) Poor Control (>9%)

Lower rates are better for this measure.

98%59 patients1/55-star benchmark: 91%

Documentation of Current Medications in the Medical Record

97%4,604 patients4/55-star benchmark: 100%

e-Prescribing

100%1,543 patients5/55-star benchmark: 100%

Preventive Care and Screening: Body Mass Index (BMI) Screening and Follow-Up Plan

32%1,237 patients2/55-star benchmark: 98%

Preventive Care and Screening: Screening for High Blood Pressure and Follow-Up Documented

0%4,085 patients1/55-star benchmark: 61%

Preventive Care and Screening: Tobacco Use: Screening and Cessation Intervention

Patients combinedPopulations: 51% · 1,641 patients

Patients screened: 59% · 1,641 patients

17%156 patients1/55-star benchmark: 100%

Provide Patients Electronic Access to Their Health Information

84%1,378 patients4/55-star benchmark: 100%

Statin Therapy for the Prevention and Treatment of Cardiovascular Disease

89%84 patients4/55-star benchmark: 91%

Use of High-Risk Medications in Older Adults

Lower rates are better for this measure.

Patients appropriateDiagnosis: 2% · 750 patients

Patients totalRate: 9% · 751 patients

7%751 patients4/55-star benchmark: 100%

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.

Referred Medical Equipment & Supplies CMS DME claims

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Lumbar orthosis, sagittal control, with rigid anterior and posterior panels, posterior extends from l-1 to below l-5 vertebra, produces intracavitary pressure to reduce load on the intervertebral discs, includes straps, closures, may include padding, shoulder straps, pendulous abdomen design, prefabricated, off-the-shelf L0642

DME-Orthotic Devices · category DF007N

1 supplier27 claims27 services$240.72 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 10

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

EMILIA JADWIGA WILMAN PTA

Physical Therapy Assistant

600 PLAZA CT STE C
EAST STROUDSBURG, PA 18301

Monroe County (570) 421-7020

MIKIAH DOWNING DPT

Physical Therapist

600 PLAZA CT STE C
EAST STROUDSBURG, PA 18301

Monroe County (570) 421-7020

PRISCILLA GONZALEZ

Specialist/Technologist (Athletic Trainer)

600 PLAZA CT STE C
E STROUDSBURG, PA 18301

Monroe County (570) 421-7020

ABBY RUSTAY PA-C

Physician Assistant

600 PLAZA CT STE C
EAST STROUDSBURG, PA 18301

Monroe County (570) 517-3769

BROOKE NICOLE HALFMANN DPT

Physical Therapist

600 PLAZA CT STE C
EAST STROUDSBURG, PA 18301

Monroe County (570) 421-7020

CAROLINA WALKER CRNP

Nurse Practitioner (Family)

600 PLAZA CT STE C
EAST STROUDSBURG, PA 18301

Monroe County (570) 517-3772

LEIGHANN CHRISTINA KRASNEY DO

Orthopaedic Surgery

600 PLAZA CT STE C
EAST STROUDSBURG, PA 18301

Monroe County (570) 421-7020

DR. ROGER MASSA COMPONOVO M.D.

Orthopaedic Surgery (Adult Reconstructive Orthopaedic Surgery)

600 PLAZA CT STE C
EAST STROUDSBURG, PA 18301

Monroe County (570) 421-7020

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 Allister Williams's NPI number?

The NPI number for Allister Williams is 1639258205. It was assigned to this individual provider in the NPPES registry on November 3, 2006.

Where is Allister Williams located?

Allister Williams practices at 600 Plaza Ct Ste C, East Stroudsburg, PA 18301. The listed phone number is (570) 421-7020.

What is Allister Williams's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.

Is Allister Williams enrolled in Medicare?

Yes. Allister 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.

Which organization bills Medicare for Allister Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Allister Williams reassigns Medicare benefits to Mountain Valley Orthopedics, P.C. (East Stroudsburg, 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 Allister Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Allister Williams affiliated with any hospitals?

According to CMS data, Allister Williams is affiliated with Bon Secours Community Hospital, Lehigh Valley Hospital, St Luke's Miners Memorial Hospital, Lehigh Valley Hospital - Pocono and St Luke's Hospital - Monroe Campus.

When was this NPI record last updated?

The NPPES record for Allister Williams was last updated on October 14, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.