Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MASON JAMES WEBB MD, PHD
NPI 1306306600
Internal Medicine - Hematology & Oncology in Oklahoma City, OK

Q: What is Mason Webb's NPI number?

The NPI number for Mason Webb is 1306306600. It was assigned to this individual provider in the NPPES registry on March 22, 2019.

Q: What is Mason Webb's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Mason Webb was last updated on July 2, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 49 days 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 March 22, 2019PECOS EnrolledAccepts Medicare Assignment

800 NE 10TH ST STE B, OKLAHOMA CITY, OK 73104(572) 244-0111(572) 244-9984 Get Directions Write a Review

NPPES record last updated: July 2, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Sep 4, 2025, Aug 26, 2020, Jul 21, 2020 and 2 more (5 updates tracked since 2019).

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About Mason James Webb Md, Phd NPPES

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

MASON JAMES WEBB MD, PHD (NPI 1306306600) is an individual hematology & oncology provider in Oklahoma City, Oklahoma, licensed in Oklahoma (45945) and active in the NPI registry since March 2019. He is enrolled in Medicare PECOS, is affiliated with Mayo Clinic Hospital Rochester, and is a graduate of Other (2019).

NPPES Registry Identity

NPI1306306600

Entity TypeIndividualMale

Primary Taxonomy207RH0003X

Provider Legal NameMASON JAMES WEBBCredential: MD, PHD

Location Address800 NE 10TH ST STE BOklahoma City, OK 73104-5418

Mailing Address800 Ne 10th St Ste BOklahoma City, OK 73104-5418 · (572) 244-0111 · Fax (572) 244-9984

Phone(572) 244-0111

Fax(572) 244-9984

Sole ProprietorNo

Medical School CMSOtherGraduated 2019

Enumeration DateMarch 22, 2019

Last NPPES UpdateJuly 2, 20265 updates tracked since enumeration

NPPES CertifiedJuly 2, 2026

✔ NPI 1306306600 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians

Taxonomy Code207RH0003X

Licenses✔ Licensed in OK · 45945✔ Licensed in MN · 67817

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.

Also ListedInternal MedicineTaxonomy 207R00000X · License 67817 (MN)

800 NE 10TH ST STE B, Oklahoma City, OK 73104

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Medica.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

Mason James Webb Md, Phd 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 ID6709111065

PECOS Enrollment IDI20200922000604, I20260130000162

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 3

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.

41 services31 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.

32 services28 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.

16 services16 patients

Hospital Affiliations CMS Care Compare 3

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

Mayo Clinic Hospital Rochester

Acute Care Hospitals · Rochester, MN

5/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number240010

Location1216 Second Street SouthwestRochester, MN 55902 · Olmsted County

Emergency services Birthing friendly

Mayo Clinic Health System - Cannon Falls

Critical Access Hospitals · Cannon Falls, MN

OwnershipVoluntary non-profit - Private

CMS Certification Number241346

Location32021 County 24 BoulevardCannon Falls, MN 55009 · Goodhue 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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 73104 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.

Other Providers at the Same Location NPPES 5

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

DR. ANDRE LUIZ PITANGA BASTOS DE SOUZA M.D

Internal Medicine (Hematology & Oncology)