Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

WILLIAM MARTIN SCHNITZ MD
NPI 1629015763
Internal Medicine - Rheumatology in Oklahoma City, OK

Q: What is William Schnitz's NPI number?

The NPI number for William Schnitz is 1629015763. It was assigned to this individual provider in the NPPES registry on May 31, 2006.

Q: What is William Schnitz'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 William Schnitz was last updated on July 20, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.

Active since May 31, 2006PECOS Enrolled

80.17/100

CMS Quality Rating

3555 NW 58TH ST STE 804, OKLAHOMA CITY, OK 73112(405) 548-0430(405) 463-4408 Get Directions Write a Review

NPPES record last updated: July 20, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

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About William Martin Schnitz Md NPPES

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

WILLIAM MARTIN SCHNITZ MD (NPI 1629015763) is an individual rheumatology provider in Oklahoma City, Oklahoma, licensed in Oklahoma (16521) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with Integris Baptist Medical Center, Inc, and is a graduate of Other (1987).

NPPES Registry Identity

NPI1629015763

Entity TypeIndividualMale

Primary Taxonomy207RR0500X

Provider Legal NameWILLIAM MARTIN SCHNITZCredential: MD

Location Address3555 NW 58TH ST STE 804Oklahoma City, OK 73112-4703

Mailing Address3555 Nw 58th St Ste 804Oklahoma City, OK 73112-4703 · (405) 548-0430 · Fax (405) 463-4408

Phone(405) 548-0430

Fax(405) 463-4408

Sole ProprietorYes

Medical School CMSOtherGraduated 1987

Enumeration DateMay 31, 2006

Last NPPES UpdateJuly 20, 2026

NPPES CertifiedJuly 20, 2026

✔ NPI 1629015763 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 OK · 16521

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 ListedInternal MedicineTaxonomy 207R00000X · License 16521 (OK)

3555 NW 58TH ST STE 804, Oklahoma City, OK 73112

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Other Identifiers 1

Medicaid100095820BOK

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Oklahoma, Medica, Mending Health 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

William Martin Schnitz Md 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 ID8628038387

PECOS Enrollment IDI20041016000179, I20240208000422

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 15

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, 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.

2,100 services19 patients

Injection, rituximab-pvvr, biosimilar, (ruxience), 10 mg Q5119

Rituximab-pvvr (Ruxience) is a biosimilar medication given via injection. It's used to treat certain types of cancer and autoimmune conditions. It works by targeting specific proteins on cells, helping your body's immune system to destroy them.

1,760 services11 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.

341 services224 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.

213 services36 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.

186 services26 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.

182 services119 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.

119 services23 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.

91 services19 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.

80 services17 patients

Injection of additional new drug or substance into vein 96375

This procedure involves introducing a new medication or substance into your bloodstream via a vein. It's typically done using a small needle. The substance can help treat various conditions or assist in diagnostic procedures. It's generally safe and monitored by professionals.

60 services12 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.

33 services33 patients

Injection, diphenhydramine hcl, up to 50 mg J1200

Diphenhydramine HCL injection is a medicine given to alleviate symptoms of allergies, colds, or hay fever. It can also help with motion sickness and certain symptoms of Parkinson's disease. Up to 50 mg may be administered depending on your condition.

30 services12 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

26 services26 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.

20 services14 patients

Aspiration and/or injection of fluid from medium joint 20605

This procedure involves a needle being inserted into a medium-sized joint, such as a knee or shoulder, to remove (aspirate) excess fluid. Sometimes, medication may also be injected into the joint to reduce inflammation and pain.

14 services12 patients

Hospital Affiliations CMS Care Compare 5

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

Integris Baptist Medical Center, Inc

Acute Care Hospitals · Oklahoma City, OK

2/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number370028

Location3300 Northwest ExpresswayOklahoma City, OK 73112 · Oklahoma County

Emergency services Birthing friendly

Stillwater Medical Center

Acute Care Hospitals · Stillwater, OK

4/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number370049

Location1323 West 6th StreetStillwater, OK 74076 · Payne County

Emergency services Birthing friendly

Grady Memorial Hospital

Acute Care Hospitals · Chickasha, OK

3/5 CMS rating

OwnershipGovernment - Local

CMS Certification Number370054

Location2220 Iowa StreetChickasha, OK 73018 · Grady County

Emergency services

O U Medical Center

Acute Care Hospitals · Oklahoma City, OK

1/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number370093

Location700 NE 13th StreetOklahoma City, OK 73104 · Oklahoma County

Emergency services Birthing friendly

Onecore Health

Acute Care Hospitals · Oklahoma City, OK

OwnershipVoluntary non-profit - Other

CMS Certification Number370220

Location100 NE 85th StreetOklahoma City, OK 73114 · Oklahoma County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 73112 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

$123.06 typical visit price

range $53.00 – $162.61

Typical copayment $30.76 (range $13.25 – $40.65)

Most-billed visit code 99204

Established Patient

$94.27 typical visit price

range $16.68 – $132.40

Typical copayment $23.56 (range $4.17 – $33.10)

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.

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.

80.17/100

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

Individually scored

Quality

88.5

Promoting Interoperability

Improvement Activities

Reported Quality Measures

Colorectal Cancer Screening

67%807 patients4/55-star benchmark: 88%

Documentation of Current Medications in the Medical Record

98%2,835 patients4/55-star benchmark: 100%

e-Prescribing

95%4,022 patients3/55-star benchmark: 100%

Preventive Care and Screening: Screening for Depression and Follow-Up Plan

84%1,344 patients4/55-star benchmark: 97%

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

34%2,494 patients3/55-star benchmark: 61%

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

Patients combinedPopulations: 29% · 680 patients

Patients screened: 29% · 680 patients

92%25 patients4/55-star benchmark: 100%

Provide Patients Electronic Access to Their Health Information

44%1,394 patients2/55-star benchmark: 100%

Use of High-Risk Medications in Older Adults

Lower rates are better for this measure.

Patients appropriateDiagnosis: 1% · 489 patients

Patients totalRate: 4% · 489 patients

4%489 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.

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Other Providers at the Same Location NPPES 2

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

SESTAK RHEUMATOLOGY

Pediatrics (Pediatric Rheumatology)

3555 NW 58TH ST STE 804
OKLAHOMA CITY, OK 73112

Oklahoma County (405) 548-0430

DR. ANDREA L SESTAK MD, PHD

Pediatrics (Pediatric Rheumatology)

3555 NW 58TH ST STE 804
OKLAHOMA CITY, OK 73112

Oklahoma County (405) 548-0430

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 Schnitz's NPI number?

The NPI number for William Schnitz is 1629015763. It was assigned to this individual provider in the NPPES registry on May 31, 2006.

Where is William Schnitz located?

William Schnitz practices at 3555 NW 58th St Ste 804, Oklahoma City, OK 73112. The listed phone number is (405) 548-0430.

What is William Schnitz's specialty?

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

Is William Schnitz enrolled in Medicare?

Yes. William Schnitz 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 William Schnitz accept?

Health plans from Blue Cross and Blue Shield of Oklahoma, Medica, Mending Health and UnitedHealthcare list William Schnitz 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 Schnitz affiliated with any hospitals?

According to CMS data, William Schnitz is affiliated with Integris Baptist Medical Center, Inc, Stillwater Medical Center, Grady Memorial Hospital, O U Medical Center and Onecore Health.

When was this NPI record last updated?

The NPPES record for William Schnitz was last updated on July 20, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.