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NANCY WILLIAMS M.D.
NPI 1235190448
Internal Medicine - Hospice and Palliative Medicine in Tulsa, OK

Active since March 29, 2006PECOS EnrolledAccepts Medicare Assignment
85.83/100
CMS Quality Rating
1705 E 19TH ST, SUITE 302, TULSA, OK 74104(918) 748-7585(918) 748-7539 Get Directions Write a Review

NPPES record last updated: December 16, 2015. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Nancy Williams M.d. NPPES

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

NANCY WILLIAMS M.D. (NPI 1235190448) is an individual hospice and palliative medicine provider in Tulsa, Oklahoma, licensed in Oklahoma (22490) and active in the NPI registry since March 2006. She is enrolled in Medicare PECOS, is affiliated with Hillcrest Medical Center, and is a graduate of University Of Oklahoma College Of Medicine (2001).

NPPES Registry Identity

NPI1235190448
Entity TypeIndividualFemale
Primary Taxonomy207RH0002X
Provider Legal NameNANCY WILLIAMSCredential: M.D.
Location Address1705 E 19TH ST, SUITE 302Tulsa, OK 74104-5405
Mailing AddressPo Box 2339Elk City, OK 73648-2339 · (580) 821-5320 · Fax (580) 225-9143
Phone(918) 748-7585
Fax(918) 748-7539
Sole ProprietorNo
Medical School CMSUniversity Of Oklahoma College Of MedicineGraduated 2001
Enumeration DateMarch 29, 2006
Last NPPES UpdateDecember 16, 2015
✔ NPI 1235190448 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Hospice and Palliative MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207RH0002X
License✔ Licensed in OK · 22490
Definition
An internal medicine physician with special knowledge and skills to prevent and relieve the suffering experienced by patients with life-limiting illnesses. This specialist works with an interdisciplinary hospice or palliative care team to maximize quality of life while addressing physical, psychological, social and spiritual needs of both patient and family throughout the course of the disease, through the dying process, and beyond for the family. This specialist has expertise in the assessment of patients with advanced disease; the relief of distressing symptoms; the coordination of interdisciplinary patient and family-centered care in diverse venues; the use of specialized care systems including hospice; the management of the imminently dying patient; and legal and ethical decision making in end-of-life care.
Also ListedInternal MedicineTaxonomy 207R00000X · License 22490 (OK)
1705 E 19TH ST, Tulsa, OK 74104
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Other Identifiers 3

Medicare ID-Type Unspecified248601302OK
Medicaid200026690AOK
Medicare UPINI06949OK

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

Nancy Williams 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 ID9133101363
PECOS Enrollment IDI20040602000973
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

4

Medicare enrollment records show Nancy Williams reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Ahs Oklahoma Physician Group LLC
0.8 mi
Family Medicine
1120 S UTICA AVE STE 100
Tulsa, OK 74104
  • Reassigned Medicare billing, Oklahoma enrollment
  • 340 clinicians in this Medicare group
NPI 1235182775 (918) 579-3826
Creek Nation Hospital & Clinics
42 mi
Clinic/Center
2900 N MAIN ST
Muskogee, OK 74401
  • Reassigned Medicare billing, Texas enrollment
  • 655 clinicians in this Medicare group
NPI 1922873611 (918) 346-7833
Healthfirst Physicians Management Services, Inc
99 mi
Hospitalist
1110 N CLASSEN BLVD, SUITE 100
Oklahoma City, OK 73106
  • Reassigned Medicare billing, Oklahoma enrollment
  • 63 clinicians in this Medicare group
NPI 1891962460 (405) 272-7452
Hospitalist Medicine Physicians Of Texas, PLLC
425 mi
Internal Medicine
18951 N MEMORIAL DR
Humble, TX 77338
  • Reassigned Medicare billing, Oklahoma enrollment
  • 284 clinicians in this Medicare group
NPI 1629307095 (281) 540-7700

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 4

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.

Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
70 services43 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.
67 services43 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.
65 services43 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
12 services12 patients

Hospital Affiliations CMS Care Compare 2

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

Hillcrest Medical Center

Acute Care Hospitals · Tulsa, OK
2/5 CMS rating
OwnershipProprietary
CMS Certification Number370001
Location1120 South Utica AvenueTulsa, OK 74104 · Tulsa County
Emergency services Birthing friendly

Hillcrest Hospital South

Acute Care Hospitals · Tulsa, OK
4/5 CMS rating
OwnershipProprietary
CMS Certification Number370202
Location8801 South 101st East AvenueTulsa, OK 74133 · Tulsa County
Emergency services Birthing friendly

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.

85.83/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality90.74
Promoting Interoperability100
Improvement Activities40
Cost51.95

Other Providers at the Same Location NPPES 20

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

TERESSA HEADRICK LEMASTER CNS
Clinical Nurse Specialist (Acute Care)
1705 E 19TH ST, SUITE 302
TULSA, OK 74104
Tulsa County (918) 748-7585
ERIN MATHEWS CAPPS PA
Physician Assistant
1705 E 19TH ST, SUITE 302
TULSA, OK 74104
Tulsa County (918) 748-7585
KRISTY LEE SUNDENE M.D.
Internal Medicine
1705 E 19TH ST, STE 302
TULSA, OK 74104
Tulsa County (918) 748-7585
HUY QUOC LUU D.O.
Family Medicine
1705 E 19TH ST, SUITE 302
TULSA, OK 74104
Tulsa County (918) 748-7585
STEPHEN ANDREW JENKS PA
Physician Assistant
1705 E 19TH ST, SUITE 302
TULSA, OK 74104
Tulsa County (918) 748-7585
SHANNON PARKER NP
Nurse Practitioner
1705 E 19TH ST, STE 302
TULSA, OK 74104
Tulsa County (918) 748-7585
MARK A KELLEY MD
Psychiatry & Neurology (Psychiatry)
1705 E 19TH ST, 512
TULSA, OK 74104
Tulsa County (918) 747-6095
KAYLYNN COATS ELMORE PA
Physician Assistant
1705 E 19TH ST, SUITE 302
TULSA, OK 74104
Tulsa County (918) 748-7585

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 Nancy Williams's NPI number?

The NPI number for Nancy Williams is 1235190448. It was assigned to this individual provider in the NPPES registry on March 29, 2006.

Where is Nancy Williams located?

Nancy Williams practices at 1705 E 19th St Suite 302, Tulsa, OK 74104. The listed phone number is (918) 748-7585.

What is Nancy Williams's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hospice and Palliative Medicine, with taxonomy code 207RH0002X.

Is Nancy Williams enrolled in Medicare?

Yes. Nancy Williams 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 Nancy Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Nancy Williams reassigns Medicare benefits to 4 organizations: Ahs Oklahoma Physician Group LLC (Tulsa, OK), Creek Nation Hospital & Clinics (Muskogee, OK), Healthfirst Physicians Management Services, Inc (Oklahoma City, OK) and Hospitalist Medicine Physicians Of Texas, PLLC (Humble, TX). 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 Nancy Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Nancy Williams 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 3 other insurers list Nancy Williams 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 Nancy Williams affiliated with any hospitals?

According to CMS data, Nancy Williams is affiliated with Hillcrest Medical Center and Hillcrest Hospital South.

When was this NPI record last updated?

The NPPES record for Nancy Williams was last updated on December 16, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.