WILLIAM H THOM M.D.
NPI 1225015456
Anesthesiology - Pain Medicine in Jerseyville, IL

Q: What is William Thom's NPI number?

The NPI number for William Thom is 1225015456. It was assigned to this individual provider in the NPPES registry on December 29, 2005.

Q: What is William Thom's specialty?

The primary specialty registered for this NPI is Anesthesiology, specializing in Pain Medicine, with taxonomy code 207LP2900X.

Q: When was this NPI record last updated?

The NPPES record for William Thom was last updated on November 13, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 23 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 December 29, 2005PECOS EnrolledAccepts Medicare Assignment

74.42/100

CMS Quality Rating

400 MAPLE SUMMIT RD, PAIN CENTER, JERSEYVILLE, IL 62052(618) 498-2273(618) 498-8316 Get Directions Write a Review

NPPES record last updated: November 13, 2024. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Nov 13, 2024, Jan 26, 2023, Sep 23, 2022 and 2 more (5 updates tracked since 2021).

On this page

About William H Thom M.d. NPPES

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

WILLIAM H THOM M.D. (NPI 1225015456) is an individual pain medicine provider in Jerseyville, Illinois, licensed in Illinois (036.118645) and active in the NPI registry since December 2005. He is enrolled in Medicare PECOS, is affiliated with Alton Memorial Hospital, and maintains 3 additional practice locations.

NPPES Registry Identity

NPI1225015456

Entity TypeIndividualMale

Primary Taxonomy207LP2900X

Provider Legal NameWILLIAM H THOMCredential: M.D.

Location Address400 MAPLE SUMMIT RD, PAIN CENTERJerseyville, IL 62052

Mailing Address390 Maple Summit RdJerseyville, IL 62052-2000 · (618) 498-7518 · Fax (618) 498-3052

Phone(618) 498-2273

Fax(618) 498-8316

Sole ProprietorNo

Medical School CMSSaint Louis University School Of MedicineGraduated 2001

Enumeration DateDecember 29, 2005

Last NPPES UpdateNovember 13, 20245 updates tracked since enumeration

NPPES CertifiedNovember 13, 2024

✔ NPI 1225015456 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyAnesthesiology · Pain MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207LP2900X

Licenses✔ Licensed in IL · 036.118645✔ Licensed in MO · 2004005755

Definition

An anesthesiologist who provides a high level of care, either as a primary physician or consultant, for patients experiencing problems with acute, chronic and/or cancer pain in both hospital and ambulatory settings. Patient care needs are also coordinated with other specialists.

Also ListedPain Medicine · Pain MedicineTaxonomy 208VP0000X · License 036118645 (IL)

400 MAPLE SUMMIT RD, Jerseyville, IL 62052

Open in Google Maps ↗

Secondary Practice Locations 3

Location 16828 State Route 162 Ste AMaryville, IL 62062-8558 · Phone (618) 288-8363 · Fax (618) 288-8364

Location 212 Wolf Creek, Suite 200Swansea, IL 62206 · Phone (618) 239-9910 ext. 1100 · Fax (618) 239-9795

Location 3220 E County Rd, E Annex BldgJerseyville, IL 62052 · Phone (618) 498-8467 · Fax (618) 639-2017

Other Identifiers 6

Other900068033IL · Tax-id#

Other036118645IL · Il License

Medicaid255414300MN

Other752332IL · Healthlink

Other900068033IL · Essence

Other08220357IL · Bcbs Grp#

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Ambetter Health of Delaware, Medica.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

William H Thom 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 ID2466480736

PECOS Enrollment IDI20070912000451

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

Medicare enrollment records show William Thom reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Jersey Community Hospital District

Same address

Family Medicine

400 MAPLE SUMMIT RD
Jerseyville, IL 62052

Reassigned Medicare billing, Illinois enrollment
Medicare enrollment name: Jersey Community Hospital
61 clinicians in this Medicare group

NPI 1134163827 (618) 498-6402

Carlinville Area Hospital Association

28 mi

Rural Health

807 BROADWAY ST
Gillespie, IL 62033

Reassigned Medicare billing, Illinois enrollment
78 clinicians in this Medicare group

NPI 1295518769 (217) 854-3900

Anderson Medical Group, LLC

33 mi

General Practice

6810 STATE ROUTE 162, SUITE 215
Maryville, IL 62062

Reassigned Medicare billing, Illinois enrollment
145 clinicians in this Medicare group

NPI 1700807716 (618) 288-5711

St Josephs Hospital Of The Hospital Sisters Of The Third Order Of St F

44 mi

Critical Access

12866 TROXLER AVE
Highland, IL 62249

Reassigned Medicare billing, Illinois enrollment
48 clinicians in this Medicare group

NPI 1447352323 (618) 654-7421

Hillsboro Area Hospital, Inc.

46 mi

Critical Access

1200 E TREMONT ST
Hillsboro, IL 62049

Reassigned Medicare billing, Illinois enrollment
Also billed through NPI 1821078213 (Illinois)
59 clinicians in this Medicare group

NPI 1194705210 (217) 532-6111

Hshs Holy Family Hospital Inc

52 mi

Obstetrics & Gynecology

150 HEALTHCARE DRIVE
Greenville, IL 62246

Reassigned Medicare billing, Illinois enrollment
42 clinicians in this Medicare group

NPI 1992889125 (618) 664-9830

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 25

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.

228 services100 patients

Injection, triamcinolone acetonide, not otherwise specified, 10 mg J3301

Triamcinolone acetonide is a medication used to reduce inflammation in the body. It's given as a 10 mg injection for conditions like allergies, arthritis, or skin problems. The injection helps to decrease swelling, redness, and itching.

116 services19 patients

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

115 services57 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.

68 services35 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

57 services30 patients

Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, single level 64483

This procedure involves injecting a mix of numbing and anti-inflammatory medication into a specific nerve root in the lower back. It helps manage pain and reduce inflammation. The process is guided by imaging technology for precision.

56 services49 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.

40 services33 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.

39 services29 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.

39 services29 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.

35 services35 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.

32 services26 patients

Destruction of lower or sacral spinal facet joint nerves using imaging guidance, single facet joint 64635

This procedure involves using imaging guidance to accurately target and destroy nerves in the lower or sacral spinal facet joint. It's done to relieve chronic back pain. The process is safe and usually effective.

29 services26 patients

Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, each additional level 64484

This procedure involves injecting an anesthetic or steroid drug into the sacral spine nerve root. It's done under imaging guidance to ensure accuracy. The process can be repeated for each additional level of the spine to help manage pain or inflammation.

26 services25 patients

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

24 services17 patients

Injection of upper or middle spine facet joint using imaging guidance, single level 64490

This procedure involves injecting medication into a joint in your upper or middle spine. It's performed under imaging guidance for precision. The aim is to reduce inflammation and pain. It's a single-level process, meaning one joint is treated at a time.

24 services15 patients

Injection of upper or middle spine facet joint using imaging guidance, second level 64491

This procedure involves injecting medication into the upper or middle spine facet joint, a small joint in your back. This is done under imaging guidance for precision. It's a second-level procedure, meaning it's done on two separate joints. It can help reduce pain and inflammation.

24 services15 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

24 services24 patients

Destruction of lower or sacral spinal facet joint nerves using imaging guidance, each additional facet joint 64636

This procedure involves using imaging technology to locate and treat nerves in your lower spine or sacral area that may be causing pain. Each additional facet joint refers to treating more than one spinal nerve. It's a non-invasive way to manage chronic back pain.

23 services20 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

20 services19 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

19 services19 patients

Testing for presence of drug, read by direct observation 80305

Testing for the presence of drugs involves collecting a sample, usually urine, which is then analyzed for specific substances. The process is monitored directly to ensure accuracy and integrity. This test helps to confirm if drugs are present in your system.

18 services17 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

18 services16 patients

Injection of substance into middle or upper spine canal using imaging guidance 62321

This procedure involves injecting a substance into your middle or upper spine canal. It's performed under imaging guidance to ensure accuracy. The substance can help diagnose or treat various conditions, providing relief from symptoms.

16 services14 patients

Removal of bone from lower spine for decompression of nerve tissue using imaging guidance, accessed through the skin 0275T

This procedure involves removing a small portion of bone from your lower spine. The goal is to relieve pressure on your nerve tissue, improving comfort and mobility. It is done through the skin using imaging technology to ensure precision and safety.

15 services15 patients

Heat destruction of intraosseous basivertebral nerve in bones of spine in lower back, first two bones 64628

This procedure involves the use of heat to disable the basivertebral nerve within the first two bones of your lower spine. It's done to alleviate chronic lower back pain. It's a safe, minimally invasive procedure with a quick recovery time.

14 services14 patients

Hospital Affiliations CMS Care Compare 5

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

Alton Memorial Hospital

Acute Care Hospitals · Alton, IL

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140002

LocationOne Memorial DriveAlton, IL 62002 · Madison County

Emergency services Birthing friendly

Osf Saint Anthony's Health Center

Acute Care Hospitals · Alton, IL

2/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number140052

LocationSt Anthony's WayAlton, IL 62002 · Madison County

Jersey Community Hospital

Acute Care Hospitals · Jerseyville, IL

3/5 CMS rating

OwnershipGovernment - Local

CMS Certification Number140059

Location400 Maple Summit RoadJerseyville, IL 62052 · Jersey County

Emergency services

Anderson Hospital

Acute Care Hospitals · Maryville, IL

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140289

Location6800 State Route 162Maryville, IL 62062 · Madison County

Emergency services Birthing friendly

Community Hospital Of Staunton

Critical Access Hospitals · Staunton, IL

OwnershipVoluntary non-profit - Private

CMS Certification Number141306

Location400 N Caldwell StStaunton, IL 62088 · Macoupin County

Emergency services

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.

74.42/100

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

Scored as part of a group practice

Quality

70.31

Promoting Interoperability

Improvement Activities

Cost

56.92

Reported Quality Measures

Care Plan

Percentage of patients aged 65 years and older who have an advance care plan or surrogate decision maker documented in the medical record that an advance care plan was discussed but the patient did not wish or was not able to name a surrogate decision maker…

100%28 patients5/55-star benchmark: 100%

Documentation of Current Medications in the Medical Record

Percentage of visits for patients aged 18 years and older for which the eligible professional or eligible clinician attests to documenting a list of current medications using all immediate resources available on the date of the encounter.

100%74 patients5/55-star benchmark: 100%

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

Percentage of patients aged 18 years and older with a BMI documented during the current encounter or during the previous twelve months AND with a BMI outside of normal parameters, a follow-up plan is documented during the encounter or during the previous…

14%65 patients1/55-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.

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. ROBERT NORMAN LEE CORPREW JR. M,D,

Family Medicine

400 MAPLE SUMMIT RD
JERSEYVILLE, IL 62052

Jersey County (618) 498-6402

JACOB SLUSSER P.T.

Physical Therapist

400 MAPLE SUMMIT RD
JERSEYVILLE, IL 62052

Jersey County (618) 498-8480

ROGER A SCHROEDER MD

Obstetrics & Gynecology (Obstetrics)

400 MAPLE SUMMIT RD
JERSEYVILLE, IL 62052

Jersey County (618) 498-3612

LARRY D REED M.D.

Radiology (Diagnostic Radiology)

400 MAPLE SUMMIT RD
JERSEYVILLE, IL 62052

Jersey County (618) 498-6402

MS. NANCY ANN TOWNZEN RN, CDE

Registered Nurse (Diabetes Educator)

400 MAPLE SUMMIT RD, JERSEY COMMUNITY HOSPITAL
JERSEYVILLE, IL 62052

Jersey County (618) 498-8402

ADVANCED IMAGING CONSULTANTS LLC

Radiology (Diagnostic Radiology)

400 MAPLE SUMMIT RD, RADIOLOGY DEPT
JERSEYVILLE, IL 62052

Jersey County (618) 498-6402

KIDNEY AND HYPERTENSION CARE MID-AMERICA LLC

Internal Medicine (Nephrology)

400 MAPLE SUMMIT RD
JERSEYVILLE, IL 62052

Jersey County (314) 628-7750

JERSEY COMMUNITY HOSPITAL DISTRICT

Family Medicine

400 MAPLE SUMMIT RD
JERSEYVILLE, IL 62052

Jersey County (618) 498-6402

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 William Thom's NPI number?

The NPI number for William Thom is 1225015456. It was assigned to this individual provider in the NPPES registry on December 29, 2005.

Where is William Thom located?

William Thom practices at 400 Maple Summit Rd Pain Center, Jerseyville, IL 62052. The listed phone number is (618) 498-2273.

What is William Thom's specialty?

The primary specialty registered for this NPI is Anesthesiology, specializing in Pain Medicine, with taxonomy code 207LP2900X.

Is William Thom enrolled in Medicare?

Yes. William Thom 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 William Thom's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Thom reassigns Medicare benefits to 6 organizations: Jersey Community Hospital District (Jerseyville, IL), Carlinville Area Hospital Association (Gillespie, IL), Anderson Medical Group, LLC (Maryville, IL), St Josephs Hospital Of The Hospital Sisters Of The Third Order Of St F (Highland, IL), Hillsboro Area Hospital, Inc. (Hillsboro, IL) and 1 more organization, listed in the Medicare section above. 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 William Thom's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does William Thom accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Medica list William Thom 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 William Thom affiliated with any hospitals?

According to CMS data, William Thom is affiliated with Alton Memorial Hospital, Osf Saint Anthony's Health Center, Jersey Community Hospital, Anderson Hospital and Community Hospital Of Staunton.

When was this NPI record last updated?

The NPPES record for William Thom was last updated on November 13, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 23 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.