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DR. LEONARD MICHAEL BOWEN M.D.
NPI 1851344048
Internal Medicine - Hematology & Oncology in Oklahoma City, OK

Active since May 18, 2006PECOS EnrolledAccepts Medicare Assignment
85.7/100
CMS Quality Rating
1011 N DEWEY AVE, 100, OKLAHOMA CITY, OK 73102(405) 228-7100(405) 228-7150 Get Directions Write a Review

NPPES record last updated: October 30, 2020. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. Leonard Michael Bowen M.d. NPPES

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

DR. LEONARD MICHAEL BOWEN M.D. (NPI 1851344048) is an individual hematology & oncology provider in Oklahoma City, Oklahoma, licensed in Oklahoma (11976) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with Great Plains Regional Medical Center, and is a graduate of Medical University Of South Carolina College Of Medicine (1979).

NPPES Registry Identity

NPI1851344048
Entity TypeIndividualMale
Primary Taxonomy207RH0003X
Provider Legal NameDR. LEONARD MICHAEL BOWENCredential: M.D.
Location Address1011 N DEWEY AVE, 100Oklahoma City, OK 73102-1024
Mailing Address1011 N Dewey Ave, 100Oklahoma City, OK 73102-1024 · (405) 228-7100 · Fax (405) 228-7150
Phone(405) 228-7100
Fax(405) 228-7150
Sole ProprietorNo
Medical School CMSMedical University Of South Carolina College Of MedicineGraduated 1979
Enumeration DateMay 18, 2006
Last NPPES UpdateOctober 30, 2020
NPPES CertifiedOctober 30, 2020
✔ NPI 1851344048 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
License✔ Licensed in OK · 11976
Definition
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
1011 N DEWEY AVE, Oklahoma City, OK 73102
Open in Google Maps ↗

Other Identifiers 1

Other11976OK · State Of Oklahoma

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan, Ambetter from Superior HealthPlan 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. Leonard Michael Bowen 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 ID9830107143
PECOS Enrollment IDI20091207000612
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

2

Medicare enrollment records show Leonard Bowen reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Ssm Health Care Of Oklahoma, Inc
0.1 mi
Nurse Anesthetist, Certified Registered
1000 N LEE AVE
Oklahoma City, OK 73102
  • Reassigned Medicare billing, Oklahoma enrollment
  • 212 clinicians in this Medicare group
NPI 1033283932 (405) 272-7000
Saints Medical Group, LLC
4.1 mi
Family Medicine
777 NW 63RD ST STE 452
Oklahoma City, OK 73116
  • Reassigned Medicare billing, Oklahoma enrollment
  • 507 clinicians in this Medicare group
NPI 1437195922 (405) 231-3857

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 10

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.
1,274 services337 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.
332 services196 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
260 services66 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.
140 services109 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
108 services41 patients
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212
This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.
82 services61 patients

Hospital Affiliations CMS Care Compare 5

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

Great Plains Regional Medical Center

Acute Care Hospitals · Elk City, OK
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number370019
Location1801 West 3rd StreetElk City, OK 73644 · Beckham County
Emergency services Birthing friendly

Ssm Health St Anthony Hospital - Oklahoma City

Acute Care Hospitals · Oklahoma City, OK
2/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number370037
Location1000 North Lee AvenueOklahoma City, OK 73101 · Oklahoma County
Emergency services Birthing friendly

Mercy Hospital Ardmore, Inc

Acute Care Hospitals · Ardmore, OK
4/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number370047
Location1011 14th Ave NWArdmore, OK 73401 · Carter County
Emergency services Birthing friendly

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

Ssm Health St Anthony Hospital - Shawnee

Acute Care Hospitals · Shawnee, OK
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number370149
Location1102 W MacarthurShawnee, OK 74804 · Pottawatomie County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 73102 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
$162.61 typical visit price
range $53.00 – $162.61
Typical copayment $40.65 (range $13.25 – $40.65)
Most-billed visit code 99205
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.

85.7/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality90.33
Promoting Interoperability100
Improvement Activities40
Cost62.01

Referred Medical Equipment & Supplies CMS DME claims 2

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

Infusion supplies for external drug infusion pump, per cassette or bag (list drugs separately) A4222
DME-Medical/Surgical Supplies · category DA000N
2 suppliers47 claims159 services$35.15 avg. paid by Medicare
Injection, deferoxamine mesylate, 500 mg J0895
Treatment-Injections and Infusions (nononcologic) · category RI000N
2 suppliers47 claims636 services$6.51 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 6

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

DR. THY KHANH NGUYEN M.D.
Internal Medicine (Hematology & Oncology)
1011 N DEWEY AVE, #100
OKLAHOMA CITY, OK 73102
Oklahoma County (405) 228-7100
DR. RALPH GERSHON GANICK M.D.
Internal Medicine (Hematology & Oncology)
1011 N DEWEY AVE, SUITE 100
OKLAHOMA CITY, OK 73102
Oklahoma County (405) 228-7100
DR. DAVID WONG LAM MD
Internal Medicine (Hematology & Oncology)
1011 N DEWEY AVE
OKLAHOMA CITY, OK 73102
Oklahoma County (405) 228-7100
OKLAHOMA ONCOLOGY AND HEMATOLOGY, P.C.
Internal Medicine (Hematology & Oncology)
1011 N DEWEY AVE, 100
OKLAHOMA CITY, OK 73102
Oklahoma County (405) 228-7100
JAMES FEISAL MD
Internal Medicine (Hematology & Oncology)
1011 N DEWEY AVE
OKLAHOMA CITY, OK 73102
Oklahoma County (405) 228-7100
SSM HEALTHCARE OF OKLAHOMA
Internal Medicine (Hematology & Oncology)
1011 N DEWEY AVE
OKLAHOMA CITY, OK 73102
Oklahoma County (405) 228-7100

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 Leonard Bowen's NPI number?

The NPI number for Leonard Bowen is 1851344048. It was assigned to this individual provider in the NPPES registry on May 18, 2006.

Where is Leonard Bowen located?

Leonard Bowen practices at 1011 N Dewey Ave 100, Oklahoma City, OK 73102. The listed phone number is (405) 228-7100.

What is Leonard Bowen's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Is Leonard Bowen enrolled in Medicare?

Yes. Leonard Bowen 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 Leonard Bowen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Leonard Bowen reassigns Medicare benefits to 2 organizations: Ssm Health Care Of Oklahoma, Inc (Oklahoma City, OK) and Saints Medical Group, LLC (Oklahoma City, OK). 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 Leonard Bowen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Leonard Bowen accept?

Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan, Ambetter from Superior HealthPlan and Ambetter of Oklahoma and 4 other insurers list Leonard Bowen 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 Leonard Bowen affiliated with any hospitals?

According to CMS data, Leonard Bowen is affiliated with Great Plains Regional Medical Center, Ssm Health St Anthony Hospital - Oklahoma City, Mercy Hospital Ardmore, Inc, O U Medical Center and Ssm Health St Anthony Hospital - Shawnee.

When was this NPI record last updated?

The NPPES record for Leonard Bowen was last updated on October 30, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.