DR. CHAD MICHAEL RONHOLM M.D.
NPI 1306027909
Internal Medicine - Rheumatology in Saint Louis, MO

Q: What is Chad Ronholm's NPI number?

The NPI number for Chad Ronholm is 1306027909. It was assigned to this individual provider in the NPPES registry on November 25, 2007.

Q: What is Chad Ronholm's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.

Q: When was this NPI record last updated?

The NPPES record for Chad Ronholm was last updated on March 29, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.

Active since November 25, 2007PECOS EnrolledAccepts Medicare Assignment

520 S ELM AVE, SAINT LOUIS, MO 63119(314) 645-4434(314) 645-3801 Get Directions Write a Review

NPPES record last updated: March 29, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Dr. Chad Michael Ronholm M.d. NPPES

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

DR. CHAD MICHAEL RONHOLM M.D. (NPI 1306027909) is an individual rheumatology provider in Saint Louis, Missouri, licensed in Missouri (2010026420) and active in the NPI registry since November 2007. He is enrolled in Medicare PECOS, is affiliated with Ssm Health St Mary's Hospital -centralia, and maintains a secondary practice location in Saint Louis.

NPPES Registry Identity

NPI1306027909

Entity TypeIndividualMale

Primary Taxonomy207RR0500X

Provider Legal NameDR. CHAD MICHAEL RONHOLMCredential: M.D.

Location Address520 S ELM AVESaint Louis, MO 63119-3845

Mailing Address520 S Elm AveSaint Louis, MO 63119-3845 · (314) 645-4434 · Fax (314) 645-3801

Phone(314) 645-4434

Fax(314) 645-3801

Sole ProprietorNo

Medical School CMSOtherGraduated 2007

Enumeration DateNovember 25, 2007

Last NPPES UpdateMarch 29, 2024

NPPES CertifiedMarch 29, 2024

✔ NPI 1306027909 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · RheumatologyAllopathic & Osteopathic Physicians

Taxonomy Code207RR0500X

License✔ Licensed in MO · 2010026420

Definition

An internist who treats diseases of joints, muscle, bones and tendons. This specialist diagnoses and treats arthritis, back pain, muscle strains, common athletic injuries and collagen diseases.

Also ListedEmergency Medicine · Emergency Medical ServicesTaxonomy 207PE0004X · License 2010026420 (MO)

520 S ELM AVE, Saint Louis, MO 63119

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Secondary Practice Location 1

Location 11 Jefferson Barracks DrSaint Louis, MO 63125-4181 · Phone (314) 652-4100

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Ambetter Health of Delaware, Anthem Blue Cross and Blue Shield 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 and accepts Medicare assignment

Dr. Chad Michael Ronholm 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 ID3678739307

PECOS Enrollment IDI20120725000481

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 Chad Ronholm reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Clayton Medical Associates, P.C.

1.3 mi

Rheumatology

520 S ELM AVE
Saint Louis, MO 63119

Reassigned Medicare billing, Missouri enrollment
Medicare enrollment name: Clayton Medical Associates PC
3 clinicians in this Medicare group

NPI 1891774329 (314) 645-4434

Sarah Bush Lincoln Health Center

73 mi

Skilled Nursing Facility

650 W TAYLOR ST
Vandalia, IL 62471

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

NPI 1306959689 (618) 283-1232

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.

Injection, tocilizumab, 1 mg J3262

Tocilizumab is a medication administered via injection. It's used to treat certain conditions like rheumatoid arthritis by reducing inflammation in the body. It works by blocking a substance in the body that leads to inflammation.

83,080 services20 patients

Injection, golimumab, 1 mg, for intravenous use J1602

Golimumab is a medication given through an IV (a small tube in your vein). It helps to reduce inflammation and pain by blocking a protein in your body that causes inflammation. It's often used to treat conditions like rheumatoid arthritis, psoriatic arthritis, and ankylosing spondylitis.

39,350 services49 patients

Injection, certolizumab pegol, 1 mg (code may be used for medicare when drug administered under the direct supervision of a physician, not for use when drug is self administered) J0717

Certolizumab pegol is a medication injected under a doctor's supervision. It's used to treat certain inflammatory conditions like rheumatoid arthritis. The injection helps reduce symptoms like pain and swelling. Note that this drug isn't for self-administration.

38,001 services12 patients

Injection, abatacept, 10 mg (code may be used for medicare when drug administered under the direct supervision of a physician, not for use when drug is self administered) J0129

Abatacept is a medication administered via injection under a doctor's supervision. It's used to treat conditions like rheumatoid arthritis by moderating the immune system. This code applies when the doctor administers the drug, not for self-administration.

21,500 services33 patients

Injection, rituximab, 10 mg J9312

Rituximab is a medication given via injection. It's used to treat certain types of cancer and autoimmune diseases. The 10 mg dosage refers to the amount of the drug in the injection. It works by targeting and destroying specific cells, helping your body's immune system.

5,400 services16 patients

Injection, denosumab, 1 mg J0897

Denosumab is a medication given via injection to strengthen your bones. It works by slowing down the cells that break down bone, improving bone density and reducing the risk of fractures. It's often used for osteoporosis treatment.

4,620 services53 patients

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.

1,220 services452 patients

Unclassified biologics J3590

Unclassified biologics are a type of treatment derived from living organisms. They can include a wide range of substances, such as vaccines, blood components, or genes, used to prevent or treat diseases. Each is specifically designed to interact with the body's natural defenses to promote healing.

1,080 services13 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.

1,038 services81 patients

Administration of chemotherapy into vein, 1 hour or less 96413

Chemotherapy is a treatment that uses drugs to destroy cancer cells. When administered into a vein, it's often through an IV. This procedure usually lasts 1 hour or less. You may feel a slight pinch as the needle is inserted, but it's generally painless.

943 services141 patients

Infusion, normal saline solution, 250 cc J7050

An infusion of normal saline solution, 250 cc, involves administering a sterile saltwater solution into your body through a vein, usually in your arm. This helps to replenish fluids, maintain hydration, and balance electrolytes in your body.

922 services139 patients

Administration of chemotherapy into vein, each additional hour 96415

Chemotherapy is a treatment method that uses drugs to destroy cancer cells. The drugs are administered into a vein, usually in the arm. Each additional hour of chemotherapy allows for more of the medication to enter your bloodstream to fight against the cancer cells.

210 services21 patients

Administration of non-hormonal anti-neoplastic chemotherapy under skin or into muscle 96401

This procedure involves giving anti-cancer drugs, which don't contain hormones, into the muscle or under the skin. These drugs help to stop the growth of cancer cells. The process is usually quick and done by a healthcare professional.

196 services13 patients

Complete ultrasound scan of joint 76881

A complete ultrasound scan of a joint is a non-invasive procedure using sound waves to create images of your joint. It helps identify problems like inflammation, injury, or disease. It's painless, safe, and doesn't involve radiation.

103 services99 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.

80 services78 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.

71 services71 patients

Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less 96365

This is a procedure where a medical professional inserts a small tube into your vein to deliver medication, nutrients, or fluids directly into your bloodstream. This can be for treatment, prevention, or diagnosis. The process typically takes less than an hour.

65 services40 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.

63 services55 patients

Injection of drug or substance under skin or into muscle 96372

This procedure involves administering medication directly under the skin or into a muscle. A small needle is used to inject the drug, allowing it to be absorbed quickly into the bloodstream. It's a common method for delivering a variety of medications.

61 services50 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.

33 services24 patients

Aspiration and/or injection of fluid from small joint using ultrasound guidance 20604

This procedure involves using ultrasound to accurately locate a small joint. A needle is then carefully inserted to remove fluid (aspiration) or inject medication. This can help diagnose or treat joint issues. It's generally safe and minimally invasive.

15 services12 patients

Administration of influenza virus vaccine G0008

The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.

13 services13 patients

Hospital Affiliations CMS Care Compare 5

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

Ssm Health St Mary's Hospital -Centralia

Acute Care Hospitals · Centralia, IL

3/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number140034

Location400 North Pleasant AvenueCentralia, IL 62801 · Marion County

Emergency services

Memorial Hospital

Acute Care Hospitals · Belleville, IL

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140185

Location4500 Memorial DriveBelleville, IL 62226 · St. Clair County

Emergency services Birthing friendly

Fayette County Hospital

Critical Access Hospitals · Vandalia, IL

OwnershipVoluntary non-profit - Other

CMS Certification Number141346

Location650 W Taylor StVandalia, IL 62471 · Fayette County

Emergency services

Barnes Jewish Hospital

Acute Care Hospitals · Saint Louis, MO

4/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number260032

LocationOne Barnes-Jewish Hospital PlazaSaint Louis, MO 63110 · St. Louis City County

Emergency services Birthing friendly

Ssm Health St Mary's Hospital - St Louis

Acute Care Hospitals · Richmond Heights, MO

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number260091

Location6420 Clayton RdRichmond Heights, MO 63117 · St. Louis County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63119 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

$128.28 typical visit price

range $55.65 – $169.38

Typical copayment $32.07 (range $13.91 – $42.34)

Most-billed visit code 99204

Established Patient

$98.37 typical visit price

range $17.76 – $137.92

Typical copayment $24.59 (range $4.44 – $34.48)

Most-billed visit code 99214

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 13

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

DR. NEAL THOMAS DECOSTA MD

Anesthesiology

520 S ELM AVE
WEBSTER GROVES, MO 63119

St. Louis County (314) 962-3464

MEGAN LINDSEY ISAACSON-SCHMID PA-C

Physician Assistant (Medical)

520 S ELM AVE
SAINT LOUIS, MO 63119

St. Louis County (314) 645-0990

RACHAEL E MEUTH PA-C

Physician Assistant

520 S ELM AVE
SAINT LOUIS, MO 63119

St. Louis County (314) 645-4434

WEBSTER AMBULATORY SURGERY CENTER LP

Clinic/Center (Ambulatory Surgical)

520 S ELM AVE
WEBSTER GROVES, MO 63119

St. Louis County (314) 962-3464

JESSICA ANDERSEN

520 S ELM AVE
WEBSTER GROVES, MO 63119

St. Louis County (314) 962-3464

ANGELIQUE MAHFOOD R.N.

Registered Nurse (Ambulatory Care)

520 S ELM AVE
WEBSTER GROVES, MO 63119

St. Louis County (314) 962-3464

MRS. TRISHA L SPECTER PA-C

Physician Assistant

520 S ELM AVE
SAINT LOUIS, MO 63119

St. Louis County (314) 645-4434

DR. JOSEPH A STAUBER M.D.

Internal Medicine (Rheumatology)

520 S ELM AVE
SAINT LOUIS, MO 63119

St. Louis County (314) 645-4434

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 Chad Ronholm's NPI number?

The NPI number for Chad Ronholm is 1306027909. It was assigned to this individual provider in the NPPES registry on November 25, 2007.

Where is Chad Ronholm located?

Chad Ronholm practices at 520 S Elm Ave, Saint Louis, MO 63119. The listed phone number is (314) 645-4434.

What is Chad Ronholm's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.

Is Chad Ronholm enrolled in Medicare?

Yes. Chad Ronholm 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 Chad Ronholm's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Chad Ronholm reassigns Medicare benefits to 2 organizations: Clayton Medical Associates, P.C. (Saint Louis, MO) and Sarah Bush Lincoln Health Center (Vandalia, IL). 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 Chad Ronholm's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Chad Ronholm accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Anthem Blue Cross and Blue Shield, Medica and UnitedHealthcare list Chad Ronholm 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 Chad Ronholm affiliated with any hospitals?

According to CMS data, Chad Ronholm is affiliated with Ssm Health St Mary's Hospital -Centralia, Memorial Hospital, Fayette County Hospital, Barnes Jewish Hospital and Ssm Health St Mary's Hospital - St Louis.

When was this NPI record last updated?

The NPPES record for Chad Ronholm was last updated on March 29, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.