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TAMMY DIANE VERMEULEN NURSE PRACTITIONER
NPI 1598095143
Nurse Practitioner - Acute Care in Oklahoma City, OK

Active since January 04, 2010PECOS EnrolledAccepts Medicare Assignment
4221 S WESTERN AVE STE 4005, OKLAHOMA CITY, OK 73109(405) 644-5040(405) 644-5039 Get Directions Write a Review

NPPES record last updated: September 28, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Sep 28, 2021, Mar 17, 2018, Aug 1, 2017 and 2 more (5 updates tracked since 2016).

About Tammy Diane Vermeulen Nurse Practitioner NPPES

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

TAMMY DIANE VERMEULEN NURSE PRACTITIONER (NPI 1598095143) is an individual acute care provider in Oklahoma City, Oklahoma, licensed in Oklahoma (77115) and active in the NPI registry since January 2010. She is enrolled in Medicare PECOS, is affiliated with Integris Baptist Medical Center, Inc, and is a graduate of Other (2009).

NPPES Registry Identity

NPI1598095143
Entity TypeIndividualFemale
Primary Taxonomy363LA2100X
Provider Legal NameTAMMY DIANE VERMEULENCredential: NURSE PRACTITIONER
Location Address4221 S WESTERN AVE STE 4005Oklahoma City, OK 73109-3436
Mailing Address4221 S Western Ave Ste 4005Oklahoma City, OK 73109-3436 · (405) 644-5040 · Fax (405) 644-5039
Phone(405) 644-5040
Fax(405) 644-5039
Sole ProprietorNo
Medical School CMSOtherGraduated 2009
Enumeration DateJanuary 4, 2010
Last NPPES UpdateSeptember 28, 20215 updates tracked since enumeration
NPPES CertifiedSeptember 28, 2021
✔ NPI 1598095143 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse Practitioner · Acute CarePhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LA2100X
License✔ Licensed in OK · 77115
Also ListedNurse Practitioner · FamilyTaxonomy 363LF0000X · License 77115 (OK)
4221 S WESTERN AVE STE 4005, Oklahoma City, OK 73109
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Accepted Insurance

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

Tammy Diane Vermeulen Nurse Practitioner 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 ID2860528858
PECOS Enrollment IDI20100330000008
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

3

Medicare enrollment records show Tammy Vermeulen reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Integris Ambulatory Care Corporation
13 mi
Family Medicine
3001 QUAIL SPRINGS PKWY
Oklahoma City, OK 73134
  • Reassigned Medicare billing, Oklahoma enrollment
  • 1,058 clinicians in this Medicare group
NPI 1750333936 (405) 951-2298
Minuteclinic Diagnostic Of Oklahoma LLC
15 mi
Family
1520 S BRYANT AVE
Edmond, OK 73013
  • Reassigned Medicare billing, Oklahoma enrollment
  • 31 clinicians in this Medicare group
NPI 1285765727 (866) 389-2727
Midwest Hospital Medicine Associates PC
176 mi
Hospitalist
1001 E 18TH ST
Grove, OK 74344
  • Reassigned Medicare billing, Oklahoma enrollment
  • 95 clinicians in this Medicare group
NPI 1124388855 (918) 786-2243

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 6

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.

Hospital discharge day management, 30 minutes or less 99238
Hospital discharge day management of 30 minutes or less includes finalizing your treatment, discussing your progress, and planning after-care at home. It ensures you're ready to leave the hospital and continue recovery safely.
179 services175 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.
169 services167 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.
41 services36 patients
Hospital discharge day management, more than 30 minutes 99239
Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.
29 services29 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.
21 services20 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
12 services12 patients

Hospital Affiliations CMS Care Compare

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 73109 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
$82.46 typical visit price
range $53.00 – $162.61
Typical copayment $20.61 (range $13.25 – $40.65)
Most-billed visit code 99203
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

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

ARUN K DEVAKONDA MD
Internal Medicine (Pulmonary Disease)
4221 S WESTERN AVE STE 4005
OKLAHOMA CITY, OK 73109
Oklahoma County (405) 644-5040

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 Tammy Vermeulen's NPI number?

The NPI number for Tammy Vermeulen is 1598095143. It was assigned to this individual provider in the NPPES registry on January 4, 2010.

Where is Tammy Vermeulen located?

Tammy Vermeulen practices at 4221 S Western Ave Ste 4005, Oklahoma City, OK 73109. The listed phone number is (405) 644-5040.

What is Tammy Vermeulen's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Acute Care, with taxonomy code 363LA2100X.

Is Tammy Vermeulen enrolled in Medicare?

Yes. Tammy Vermeulen 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 Tammy Vermeulen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Tammy Vermeulen reassigns Medicare benefits to 3 organizations: Integris Ambulatory Care Corporation (Oklahoma City, OK), Minuteclinic Diagnostic Of Oklahoma LLC (Edmond, OK) and Midwest Hospital Medicine Associates PC (Grove, 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 Tammy Vermeulen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Tammy Vermeulen accept?

Health plans from Blue Cross and Blue Shield of Oklahoma list Tammy Vermeulen 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 Tammy Vermeulen affiliated with any hospitals?

According to CMS data, Tammy Vermeulen is affiliated with Integris Baptist Medical Center, Inc.

When was this NPI record last updated?

The NPPES record for Tammy Vermeulen was last updated on September 28, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.