Independent US Healthcare Provider Directory & Public Medical Database Patient Guides

Dr. Peter E Lantz , MD

Internal Medicine • Tulsa, OK

Active NPI 1659358570 Individual Practitioner Male Practitioner Accepts Medicare assignment Telehealth (some services)
Practice location in NPPES

6585 S Yale Ave, Ste 1150
Tulsa, OK 741368384

Call 9184949425 Location details and other listings
Medical Disclaimer

This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.

Practice Location & Contact Primary Location

Practice Address

6585 S Yale Ave
Ste 1150

Tulsa, OK 741368384

Telephone 9184949425
Fax 9184949481
Organization at the Same NPPES Address or Phone
Central States Orthopedic Specialists, Inc Facility NPI 1922081959

Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.

Other Listings in Public Data

CMS Doctors and Clinicians lists 1 group name: Warren Clinic Inc. See the list

Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.

Listings do not confirm current availability, employment or a shared ownership network.

Medicare Profile & Education

Source: CMS Doctors and Clinicians National Downloadable File

Medical School

University Of Oklahoma College Of Medicine

Graduation Year

1983

Medicare patients

436 people with Original Medicare in 2024

Different Original Medicare patients in 2024; counts below 11 are hidden; this does not show availability or quality.

Source: CMS, Medicare Physician & Other Practitioners – by Provider, 2024.

Medicare-allowed amount

About $159,106 in 2024

The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.

What this does not show: Medicare-allowed amount

This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.

Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.

Paid by Medicare

About $104,659 in 2024

The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.

What this does not show: Paid by Medicare

This is not the clinician's income and not a measure of quality.

Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.

30-day fills

25,840 standardized 30-day fills in 2024

CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.

What this does not show: 30-day fills

It is not a count of patients and not a measure of quality.

Part D drug cost

$825,143 in 2024

The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.

What this does not show: Part D drug cost

A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.

Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.

Open Payments general payments, program year 2025

All general payments: $2,722.99 across 139 records.

By nature of payment

  • Food and Beverage: $2,722.99 across 139 records.

Reporting-company totals (3 largest of 27)

  • ABBVIE INC.: $352.41 across 23 records.
  • Pfizer Inc.: $261.05 across 14 records.
  • Boehringer Ingelheim Pharmaceuticals, Inc.: $252.02 across 8 records.

A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.

See the full table

Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).

Guide: How to read an Open Payments record

Years since graduation

43 years (graduated 1983)

CMS Doctors and Clinicians data list 1983 as the year this clinician finished professional school.

What this does not show: Years since graduation

It is not the number of years in practice, and more years does not mean better care.

Source: CMS Doctors and Clinicians National Downloadable File.

NPI first issued

2005

The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.

What this does not show: NPI first issued

NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.

Source: CMS NPPES NPI Registry.

Accepts Medicare assignment

CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.

Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.

Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”

Guide: What Medicare assignment means

Telehealth (some services)

Recent Medicare claims show this clinician provided some services by telehealth, such as a video or phone visit.

What this does not show: Telehealth (some services)

It does not mean all services are offered by telehealth, or that telehealth is covered by your plan.

Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.

Guide: How Medicare covers telehealth

Enrolled in Medicare (PECOS)

Dr. Lantz has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.

It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What Medicare enrollment (PECOS) means

Can order Medicare-covered services

CMS lists Dr. Lantz as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.

What this does not show: Can order Medicare-covered services

It does not mean the clinician offers these services directly.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What ordering and referring status means

Compared with the same specialty in Tulsa and Oklahoma

Billing and prescribing volume is not a quality rating.

Medicare Part B services

More Medicare Part B services than 90% of clinicians listed under Internal Medicine in Tulsa, OK (2024, 196 clinicians with data). Median for this group: 690. Middle half: 397 to 1,313.

More Medicare Part B services than 90% of clinicians listed under Internal Medicine in Oklahoma (2024, 608 clinicians with data). Median for this group: 786. Middle half: 370 to 1,552.

Medicare-allowed amount

A higher Medicare-allowed amount than 85% of clinicians listed under Internal Medicine in Tulsa, OK (2024, 196 clinicians with data). Median for this group: $67,394. Middle half: $41,187 to $101,502.

A higher Medicare-allowed amount than 80% of clinicians listed under Internal Medicine in Oklahoma (2024, 608 clinicians with data). Median for this group: $72,879. Middle half: $34,595 to $122,743.

Paid by Medicare

A higher Medicare payment amount than 85% of clinicians listed under Internal Medicine in Tulsa, OK (2024, 196 clinicians with data). Median for this group: $50,257. Middle half: $28,716 to $78,800.

A higher Medicare payment amount than 75% of clinicians listed under Internal Medicine in Oklahoma (2024, 608 clinicians with data). Median for this group: $54,503. Middle half: $25,299 to $94,383.

Medicare Part D prescriptions

More Part D prescriptions than 90% of clinicians listed under Internal Medicine in Tulsa, OK (2024, 196 clinicians with data). Median for this group: 739. Middle half: 98 to 5,882.

More Part D prescriptions than 90% of clinicians listed under Internal Medicine in Oklahoma (2024, 661 clinicians with data). Median for this group: 626. Middle half: 89 to 5,646.

Part D drug cost

A higher Part D drug cost than 80% of clinicians listed under Internal Medicine in Tulsa, OK (2024, 196 clinicians with data). Median for this group: $94,990. Middle half: $3,786 to $659,546.

A higher Part D drug cost than 80% of clinicians listed under Internal Medicine in Oklahoma (2024, 661 clinicians with data). Median for this group: $76,711. Middle half: $1,967 to $572,569.

308 active clinicians are listed under Internal Medicine with a practice address in Tulsa, OK (1,116 in Oklahoma).

Addresses are self-reported to NPPES and may be out of date.

Telehealth indicator in Tulsa

20.8% of these 308 clinicians have the CMS telehealth indicator.

67.2% of these 308 clinicians are listed by CMS as accepting Medicare assignment.

Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.

Text: T-MedInfo · Report an error.

Pharma & Medical Device Financial Disclosures

Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments

Open Payments · Program Year 2025
Disclosure Year:

Program year 2025 (payments made January 1 – December 31, 2025): 139 records totaling $2,722.99.

Manufacturer Payment Nature Product Type Amount ($)
Otsuka America Pharmaceutical, Inc.
Food and Beverage
In-kind items and services
REXULTI General $121.18
Regeneron Pharmaceuticals, Inc.
Food and Beverage
In-kind items and services
EVKEEZA General $118.28
Boehringer Ingelheim Pharmaceuticals, Inc.
Food and Beverage
In-kind items and services
JARDIANCE General $113.97
Astellas Pharma US Inc
Food and Beverage
In-kind items and services
Veozah General $33.04
Novo Nordisk Inc
Food and Beverage
In-kind items and services
Ozempic General $29.40
Otsuka America Pharmaceutical, Inc.
Food and Beverage
In-kind items and services
REXULTI General $29.31
Pfizer Inc.
Food and Beverage
In-kind items and services
NURTEC ODT General $29.28
AstraZeneca Pharmaceuticals LP
Food and Beverage
In-kind items and services
FARXIGA General $28.99
Boehringer Ingelheim Pharmaceuticals, Inc.
Food and Beverage
In-kind items and services
JARDIANCE General $26.20
Dexcom, Inc.
Food and Beverage
In-kind items and services
Dexcom G6 Transmitter General $25.55
ABBVIE INC.
Food and Beverage
In-kind items and services
QULIPTA General $25.49
Sumitomo Pharma America, Inc.
Food and Beverage
In-kind items and services
GEMTESA General $25.35
Novo Nordisk Inc
Food and Beverage
In-kind items and services
Ozempic General $25.30
Aimmune Therapeutics, Inc.
Food and Beverage
In-kind items and services
ZENPEP General $25.05
ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.)
Food and Beverage
In-kind items and services
CAPLYTA General $24.66
ABBVIE INC.
Food and Beverage
In-kind items and services
LINZESS General $24.55
Aimmune Therapeutics, Inc.
Food and Beverage
In-kind items and services
ZENPEP General $24.52
Pfizer Inc.
Food and Beverage
In-kind items and services
NURTEC ODT General $23.83
Novo Nordisk Inc
Food and Beverage
In-kind items and services
Ozempic General $23.52
Boehringer Ingelheim Pharmaceuticals, Inc.
Food and Beverage
In-kind items and services
JARDIANCE General $23.46
Takeda Pharmaceuticals U.S.A., Inc.
Food and Beverage
In-kind items and services
TRINTELLIX General $22.86
Pfizer Inc.
Food and Beverage
In-kind items and services
PREVNAR 20 General $22.76
Dexcom, Inc.
Food and Beverage
In-kind items and services
Dexcom G6 Transmitter General $22.67
Axsome Therapeutics, Inc.
Food and Beverage
In-kind items and services
Auvelity General $22.37
ABBVIE INC.
Food and Beverage
In-kind items and services
LINZESS General $22.28

(top 25 shown)

Source: CMS Open Payments, program year 2025, released June 30, 2026.

Performed Procedures & Service Volume

Services billed to Original Medicare Part B in 2024.

CMS Part B · Data Year 2024
Reporting Year:

CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners – by Provider and Service data, 2017–2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.

HCPCS Code Services Patients Submitted Charge Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
699 354 $213.61 $69.68
71046 X-ray of chest, 2 views
376 324 $50.11 $20.40
93000 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report
360 328 $52.00 $13.12
G2211 Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's
302 168 $35.00 $15.13
99213 Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
279 168 $150.89 $67.48
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes
278 73 $162.69 $72.13
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit
266 266 $225.00 $43.89
J3301 Injection, triamcinolone acetonide, not otherwise specified, 10 mg
164 34 $4.00 $0.97
96372 Injection of drug or substance under skin or into muscle
102 47 $52.00 $13.13
90653 Influenza vaccine, inactivated
74 74 $90.00 $80.71
G0008 Administration of influenza virus vaccine
74 74 $41.00 $30.07
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes
57 50 $449.00 $162.06
99495 Transitional care management services for problem of at least moderate complexity
56 47 $417.32 $90.63
99239 Hospital discharge day management, more than 30 minutes
55 43 $237.00 $104.08
J0696 Injection, ceftriaxone sodium, per 250 mg
48 14 $6.00 $0.47
G0009 Administration of pneumococcal vaccine
23 23 $41.00 $30.07
90677 Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use
22 22 $529.00 $289.57
G0402 Initial preventive physical examination; face-to-face visit, services limited to new beneficiary during the first 12 months of medicare enrollment
17 17 $319.00 $126.33
99421 Online digital evaluation and management service for an established patient for up to 7 days, total time 5-10 minutes
15 14 $35.00 $13.75
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
14 14 $317.00 $155.66
G0438 Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit
13 13 $339.00 $117.82

Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits

Submitted charges are billed amounts, not a price quote for your visit.

Medicare Part D Prescribing Profile & Medications

Medicare Part D prescriptions filled, including refills, in 2024.

CMS Part D · Data Year 2024
Prescription Year:
Brand Name Generic Name Prescriptions Day Supply Total Cost Patients
Amlodipine Besylate Amlodipine Besylate 575 40,376 $5,071.59 149
Levothyroxine Sodium Levothyroxine Sodium 560 41,168 $4,152.81 142
Atorvastatin Calcium Atorvastatin Calcium 434 37,173 $9,356.82 136
Metoprolol Succinate Metoprolol Succinate 401 32,091 $7,775.83 117
Rosuvastatin Calcium Rosuvastatin Calcium 385 31,534 $12,562.17 123
Gabapentin Gabapentin 358 17,944 $4,001.99 82
Hydrochlorothiazide Hydrochlorothiazide 358 25,354 $2,090.11 93
Lisinopril Lisinopril 355 26,832 $3,193.46 98
Potassium Chloride Potassium Chloride 324 19,465 $5,233.83 86
Omeprazole Omeprazole 269 19,452 $4,952.51 68
Eliquis Apixaban 255 11,029 $207,095.31 49
Losartan Potassium Losartan Potassium 246 19,561 $3,182.00 77
Pantoprazole Sodium Pantoprazole Sodium 224 15,908 $4,039.07 63
Tramadol Hcl Tramadol Hcl 215 4,189 $1,897.78 52
Tamsulosin Hcl Tamsulosin Hcl 208 15,920 $3,249.94 61
Furosemide Furosemide 194 12,331 $881.10 58
Metformin Hcl Metformin Hcl 171 14,760 $1,811.45 53
Donepezil Hcl Donepezil Hcl 168 9,946 $1,963.07 42
Simvastatin Simvastatin 160 13,729 $2,170.73 46
Azithromycin Azithromycin 154 768 $904.81 124
Triamterene-Hydrochlorothiazid Triamterene/Hydrochlorothiazid 149 11,540 $1,376.83 41
Atenolol Atenolol 138 9,439 $1,714.74 34
Alprazolam Alprazolam 135 5,095 $968.68 47
Pravastatin Sodium Pravastatin Sodium 134 11,950 $4,292.01 40
Allopurinol Allopurinol 133 9,755 $2,079.58 32

(top 25 shown)

Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits

Specialties & License Numbers Reported to NPPES

Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

License # reported to NPPES OK 14911

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Check License Status with the State Board License numbers are self-reported to NPPES; T-MedInfo does not confirm them against state records. Current status: Oklahoma State Board of Medical Licensure.
Look Up on State Board Site

Medicare (PECOS) Enrollment & Ordering Eligibility

Source: CMS PECOS
Medicare FFS Enrollment Status Medicare Enrollment on File
CMS Provider Specialty

PRACTITIONER - INTERNAL MEDICINE

Medicare Enrollment ID

I20071108000626

Enrollment State Jurisdiction

OK

PECOS Control ID

9537257571

Medicare Order & Referring Eligibility
Clinical Lab & Imaging (Part B) Eligible
Durable Medical Equipment (DME) Eligible
Home Health Agency (HHA) Eligible
Power Mobility Devices (PMD) Eligible

Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.

Medicare Group Practice Enrollments

Source: CMS Doctors and Clinicians National Downloadable File

Warren Clinic Inc

6600 S Yale Ave, Tulsa, OK 741363331

Phone: 9184886000

Warren Clinic Inc

6161 S Yale Ave, Tulsa, OK 741361902

Phone: 9185024720

Clinicians Sharing This Practice Address or Phone

Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.

8 listed
Khanh Agrawal , APRN-CNP FNP-C

Nurse Practitioner - Family

NPI 1699462671

APRNCNPFNPC

Dr. James Bailey , MD

Internal Medicine

NPI 1699750349

Doctor of Medicine (M.D.)

Dr. Mark Galles , MD

Internal Medicine

NPI 1982681482

Doctor of Medicine (M.D.)

Dr. Steven Geister , MD

Internal Medicine

NPI 1265707327

Doctor of Medicine (M.D.)

Dr. Joe Reese , MD

Internal Medicine

NPI 1730152265

Doctor of Medicine (M.D.)

Dr. Jessica Singh , DO

Internal Medicine

NPI 1700383429

Doctor of Osteopathic Medicine (D.O.)

Career & Practice History

NPI enumerated December 30, 2005.

No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.

No reviews have been published yet. Leave a review.

NPI Administrative Meta

NPI Number: 1659358570
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: December 30, 2005
Last Update: April 20, 2008
Sole Proprietor: No

Other Internal Medicine Providers in Tulsa

All Internal Medicine Providers in Tulsa

Mailing Address

6600 S Yale Ave, Ste 1400

Tulsa, OK 741363310

Phone: 9184886001

About This Data NPPES fields (address, phone, specialty, license) are self-reported and may be outdated; Medicare fields follow the CMS dataset named in each section. Correct directly at NPPES.