NEAL SIEX D.O.
NPI 1871555912
Anesthesiology in Tulsa, OK
About Neal Siex D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
NEAL SIEX D.O. (NPI 1871555912) is an individual anesthesiology provider in Tulsa, Oklahoma, licensed in Oklahoma (3492) and active in the NPI registry since April 2006. He is enrolled in Medicare PECOS, is affiliated with Ascension St John Medical Center, and is a graduate of Oklahoma State University College Of Osteopathic Medicine (1991).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 4
Accepted 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
Neal Siex D.o. 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.
Medicare Billing Reassignments
4Medicare enrollment records show Neal Siex reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Tulsa, OK 74146
- Reassigned Medicare billing, Oklahoma enrollment
- 23 clinicians in this Medicare group
Jenks, OK 74037
- Reassigned Medicare billing, Oklahoma enrollment
- 199 clinicians in this Medicare group
Tulsa, OK 74133
- Reassigned Medicare billing, Oklahoma enrollment
- 17 clinicians in this Medicare group
Arlington, TX 76006
- Reassigned Medicare billing, Oklahoma enrollment
- 144 clinicians in this Medicare group
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 Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Ascension St John Medical Center
Acute Care Hospitals · Tulsa, OKMedicare 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.
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.
TULSA, OK 74104
TULSA, OK 74104
TULSA, OK 74104
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 Neal Siex's NPI number?
The NPI number for Neal Siex is 1871555912. It was assigned to this individual provider in the NPPES registry on April 4, 2006.
Where is Neal Siex located?
Neal Siex practices at 1611 S Utica Ave Ste 217, Tulsa, OK 74104. The listed phone number is (918) 744-3664.
What is Neal Siex's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Neal Siex enrolled in Medicare?
Yes. Neal Siex 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 Neal Siex's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Neal Siex reassigns Medicare benefits to 4 organizations: Sooner Anesthesia Services LLC (Tulsa, OK), Integral Anesthesia, LLC (Jenks, OK), Anesthesia Associates Of Tulsa, PLLC (Tulsa, OK) and Northstar Anesthesia Of Oklahoma, PLLC (Arlington, 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 Neal Siex's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Neal Siex accept?
Health plans from Blue Cross and Blue Shield of Oklahoma list Neal Siex 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 Neal Siex affiliated with any hospitals?
According to CMS data, Neal Siex is affiliated with Ascension St John Medical Center.
When was this NPI record last updated?
The NPPES record for Neal Siex was last updated on May 28, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.
# Neal Siex, D.O. · NPI 1871555912
Anesthesiology physician in Tulsa, Oklahoma. Individual provider, active in the CMS NPPES registry since April 4, 2006.
## Identity
- **NPI:** 1871555912 (Entity type: Individual)
- **Enumerated:** April 4, 2006
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** 3492 (Oklahoma)
- **Sole proprietor:** No
## Practice location
- **Address:** 1611 S UTICA AVE, STE 217, Tulsa, OK 74104-4909
- **Phone:** (918) 744-3664 · **Fax:** (918) 748-7688
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): Sooner Anesthesia Services LLC (NPI 1720080401, Tulsa, OK); Integral Anesthesia, LLC (NPI 1881041515, Jenks, OK); Anesthesia Associates Of Tulsa, PLLC (NPI 1174970669, Tulsa, OK); Northstar Anesthesia Of Oklahoma, PLLC (NPI 1043516628, Arlington, TX) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Oklahoma State University College Of Osteopathic Medicine, class of 1991
## Record status
- **NPPES last updated:** May 28, 2015
- **Other identifiers:** Other P00340524 (OK); Medicare PIN 249601310 (OK); Medicaid 100091160A (OK); and 1 more
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Source: [NPI Profile](https://npiprofile.com/npi/1871555912) · Data from the CMS NPPES public registry.