Independent US Healthcare Provider Directory & Public Medical Database Patient Guides

Dr. Daniel Martin Harwell , MD

Neurological Surgery • Tulsa, OK

Active NPI 1679890701 Individual Practitioner Male Practitioner Accepts Medicare assignment Telehealth (some services)
Practice location in NPPES

6802 S Olympia Ave, Suite #300
Tulsa, OK 741321826

Call 9187490762 Location details and other listings
Medical Disclaimer

This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.

Practice Location & Contact Primary Location

Practice Address

6802 S Olympia Ave
Suite #300

Tulsa, OK 741321826

Telephone 9187490762
Fax 9187444246
Organization at the Same NPPES Address or Phone
Oklahoma Spine And Brain Institute, Llp Facility NPI 1588625339

Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.

Other Listings in Public Data

CMS Doctors and Clinicians lists 1 group name: Oklahoma Spine And Brain Institute Llp. See the list

Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.

Listings do not confirm current availability, employment or a shared ownership network.

Medicare Profile & Education

Source: CMS Doctors and Clinicians National Downloadable File

Medical School

University Of Michigan Medical School

Graduation Year

2017

Medicare patients

229 people with Original Medicare in 2024

Different Original Medicare patients in 2024; counts below 11 are hidden; this does not show availability or quality.

Source: CMS, Medicare Physician & Other Practitioners – by Provider, 2024.

Medicare-allowed amount

About $150,442 in 2024

The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.

What this does not show: Medicare-allowed amount

This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.

Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.

Paid by Medicare

About $116,505 in 2024

The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.

What this does not show: Paid by Medicare

This is not the clinician's income and not a measure of quality.

Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.

30-day fills

355 standardized 30-day fills in 2024

CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.

What this does not show: 30-day fills

It is not a count of patients and not a measure of quality.

Part D drug cost

$7,848 in 2024

The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.

What this does not show: Part D drug cost

A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.

Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.

Open Payments general payments, program year 2025

All general payments: $24,567.34 across 40 records.

By nature of payment

  • Consulting Fee: $19,500.00 across 3 records.
  • Travel and Lodging: $2,664.63 across 7 records.
  • Food and Beverage: $2,402.71 across 30 records.

Reporting-company totals (3 largest of 14)

  • Omnia Medical, LLC: $8,500.00 across 1 record.
  • ZSFab, Inc.: $6,998.84 across 2 records.
  • Cerapedics Inc.: $4,938.03 across 2 records.

A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.

See the full table

Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).

Guide: How to read an Open Payments record

Years since graduation

9 years (graduated 2017)

CMS Doctors and Clinicians data list 2017 as the year this clinician finished professional school.

What this does not show: Years since graduation

It is not the number of years in practice, and more years does not mean better care.

Source: CMS Doctors and Clinicians National Downloadable File.

NPI first issued

2010

The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.

What this does not show: NPI first issued

NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.

Source: CMS NPPES NPI Registry.

Accepts Medicare assignment

CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.

Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.

Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”

Guide: What Medicare assignment means

Telehealth (some services)

Recent Medicare claims show this clinician provided some services by telehealth, such as a video or phone visit.

What this does not show: Telehealth (some services)

It does not mean all services are offered by telehealth, or that telehealth is covered by your plan.

Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.

Guide: How Medicare covers telehealth

Enrolled in Medicare (PECOS)

Dr. Harwell has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.

It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What Medicare enrollment (PECOS) means

Can order Medicare-covered services

CMS lists Dr. Harwell as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.

What this does not show: Can order Medicare-covered services

It does not mean the clinician offers these services directly.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What ordering and referring status means

Compared with the same specialty in Tulsa and Oklahoma

Billing and prescribing volume is not a quality rating.

Medicare Part B services

More Medicare Part B services than 90% of clinicians listed under Neurological Surgery in Tulsa, OK (2024, 16 clinicians with data). Median for this group: 580. Middle half: 409 to 931.

More Medicare Part B services than 95% of clinicians listed under Neurological Surgery in Oklahoma (2024, 56 clinicians with data). Median for this group: 435. Middle half: 204 to 816.

Medicare-allowed amount

A higher Medicare-allowed amount than 60% of clinicians listed under Neurological Surgery in Tulsa, OK (2024, 16 clinicians with data). Median for this group: $92,763. Middle half: $57,117 to $175,674.

A higher Medicare-allowed amount than 60% of clinicians listed under Neurological Surgery in Oklahoma (2024, 56 clinicians with data). Median for this group: $65,144. Middle half: $26,540 to $181,814.

Paid by Medicare

A higher Medicare payment amount than 60% of clinicians listed under Neurological Surgery in Tulsa, OK (2024, 16 clinicians with data). Median for this group: $70,541. Middle half: $42,492 to $136,346.

A higher Medicare payment amount than 60% of clinicians listed under Neurological Surgery in Oklahoma (2024, 56 clinicians with data). Median for this group: $50,294. Middle half: $19,630 to $140,147.

Medicare Part D prescriptions

More Part D prescriptions than 65% of clinicians listed under Neurological Surgery in Tulsa, OK (2024, 13 clinicians with data). Median for this group: 152. Middle half: 106 to 391.

More Part D prescriptions than 70% of clinicians listed under Neurological Surgery in Oklahoma (2024, 48 clinicians with data). Median for this group: 153. Middle half: 70 to 364.

Part D drug cost

A higher Part D drug cost than 80% of clinicians listed under Neurological Surgery in Tulsa, OK (2024, 13 clinicians with data). Median for this group: $1,767. Middle half: $660 to $4,295.

A higher Part D drug cost than 90% of clinicians listed under Neurological Surgery in Oklahoma (2024, 48 clinicians with data). Median for this group: $1,731. Middle half: $566 to $4,184.

29 active clinicians are listed under Neurological Surgery with a practice address in Tulsa, OK (99 in Oklahoma).

Addresses are self-reported to NPPES and may be out of date.

Telehealth indicator in Tulsa

13.8% of these 29 clinicians have the CMS telehealth indicator.

65.5% of these 29 clinicians are listed by CMS as accepting Medicare assignment.

Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.

Text: T-MedInfo · Report an error.

Pharma & Medical Device Financial Disclosures

Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments

Open Payments · Program Year 2025
Disclosure Year:

Program year 2025 (payments made January 1 – December 31, 2025): 40 records totaling $24,567.34.

Manufacturer Payment Nature Product Type Amount ($)
Omnia Medical, LLC
Consulting Fee
Cash or cash equivalent
— General $8,500.00
ZSFab, Inc.
Consulting Fee
Cash or cash equivalent
— General $6,200.00
Cerapedics Inc.
Consulting Fee
Cash or cash equivalent
I-FACTOR PEPTIDE ENHANCED BONE GRAFT General $4,800.00
ZSFab, Inc.
Food and Beverage
Cash or cash equivalent
— General $798.84
Pylant Medical
Travel and Lodging
In-kind items and services
— General $736.37
Pylant Medical
Travel and Lodging
In-kind items and services
— General $471.95
Arthrex, Inc.
Travel and Lodging
In-kind items and services
— General $438.45
Arthrex, Inc.
Travel and Lodging
In-kind items and services
— General $438.45
Arthrex, Inc.
Travel and Lodging
In-kind items and services
— General $438.45
Arthrex, Inc.
Food and Beverage
In-kind items and services
— General $145.90
Cerapedics Inc.
Food and Beverage
In-kind items and services
I-FACTOR PEPTIDE ENHANCED BONE GRAFT General $138.03
Medtronic, Inc.
Food and Beverage
In-kind items and services
INCEPTIV General $136.43
SI-BONE, INC.
Food and Beverage
Cash or cash equivalent
— General $133.23
Pylant Medical
Food and Beverage
In-kind items and services
— General $119.76
Medinc of Texas
Food and Beverage
In-kind items and services
— General $113.64
Elevation Spine, Inc.
Food and Beverage
Cash or cash equivalent
— General $108.85
Medtronic, Inc.
Food and Beverage
In-kind items and services
AQUAMANTYS(TM) General $76.37
Pylant Medical
Travel and Lodging
In-kind items and services
— General $72.96
Pylant Medical
Travel and Lodging
In-kind items and services
— General $68.00
Arthrex, Inc.
Food and Beverage
In-kind items and services
— General $60.00
Arthrex, Inc.
Food and Beverage
In-kind items and services
— General $54.00
Providence Medical Technology, Inc.
Food and Beverage
In-kind items and services
— General $53.40
Pylant Medical
Food and Beverage
In-kind items and services
— General $50.03
Arthrex, Inc.
Food and Beverage
In-kind items and services
— General $45.00
Arthrex, Inc.
Food and Beverage
In-kind items and services
— General $41.95

(top 25 shown)

Source: CMS Open Payments, program year 2025, released June 30, 2026.

Performed Procedures & Service Volume

Services billed to Original Medicare Part B in 2024.

CMS Part B · Data Year 2024
Reporting Year:

CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners – by Provider and Service data, 2017–2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.

HCPCS Code Services Patients Submitted Charge Medicare Allowed
J1010 Injection, methylprednisolone acetate, 1 mg
2,040 25 $1.00 $0.13
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
105 79 $205.00 $117.24
72100 X-ray of lower and sacral spine, 2-3 views
72 47 $127.00 $35.64
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more
62 55 $300.00 $165.17
99213 Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
57 46 $135.00 $83.26
22853 Insertion of cage or mesh device to spine bone and disc space during spine fusion
55 32 $1408.00 $235.42
72110 X-ray of lower and sacral spine, minimum of 4 views
52 51 $175.00 $46.29
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
45 45 $240.00 $155.02
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more
29 29 $320.00 $204.16
72040 X-ray of upper spine, 2-3 views
27 19 $125.00 $35.42
27096 Injection of anesthetic or steroid into joint between lower spine and hip bone using imaging guidance
24 17 $1151.00 $185.60
64483 Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, single level
23 19 $1031.61 $269.78
J1030 Injection, methylprednisolone acetate, 40 mg
23 15 $27.00 $6.32
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes
22 21 $267.00 $121.66
72050 X-ray of upper spine, 4-5 views
21 21 $172.00 $47.82
20985 Computer-assisted surgery for muscle and bone procedure
20 20 $620.00 $133.01
22633 Fusion of spine in lower back with partial removal of spine bone and disc
15 15 $6848.00 $1664.75
22842 Placement of stabilizing device to back, 3-6 spine bone segments
15 15 $5650.00 $698.78
72070 X-ray of middle spine, 2 views
15 11 $127.00 $29.56
27279 Fusion of pelvic joint using imaging guidance
13 11 $2540.00 $740.34
22551 Fusion of upper spine bone with removal of disc and release of spinal cord or nerve, 1 disc
12 12 $6390.00 $1517.42
22840 Placement of stabilizing device to back of 1 spine bone in neck
11 11 $4963.00 $693.41
63052 Partial removal of bone of single segment of spine in lower back with release of spinal cord and/or nerves during fusion of spine in lower back
11 11 $750.00 $236.66

Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits

Submitted charges are billed amounts, not a price quote for your visit.

Medicare Part D Prescribing Profile & Medications

Medicare Part D prescriptions filled, including refills, in 2024.

CMS Part D · Data Year 2024
Prescription Year:
Brand Name Generic Name Prescriptions Day Supply Total Cost Patients
Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen 114 1,145 $2,256.03 83
Cyclobenzaprine Hcl Cyclobenzaprine Hcl 75 2,201 $1,348.76 58
Methylprednisolone Methylprednisolone 40 238 $369.69 35
Oxycodone-Acetaminophen Oxycodone Hcl/Acetaminophen 29 463 $1,191.06 21
Naloxone Hcl Naloxone Hcl 28 209 $1,642.71 27
Oxycodone Hcl Oxycodone Hcl 27 548 $527.94 12
Gabapentin Gabapentin 20 600 $285.39 —
Hydromorphone Hcl Hydromorphone Hcl 11 122 $81.37 —
Tizanidine Hcl Tizanidine Hcl 11 315 $145.18 —

Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits

Specialties & License Numbers Reported to NPPES

Self-certified to NPPES: 2020-10-07
Neurological Surgery Primary Specialty

NUCC Taxonomy Code: 207T00000X

License # reported to NPPES OK 32880

A neurological surgeon provides the operative and non-operative management (i.e., prevention, diagnosis, evaluation, treatment, critical care, and rehabilitation) of disorders of the central, peripheral, and autonomic nervous systems, including their supporting structures and vascular supply; the evaluation and treatment of pathological processes which modify function or activity of the nervous system; and the operative and non-operative management of pain. A neurological surgeon treats patients with disorders of the nervous system; disorders of the brain, meninges, skull, and their blood supply, including the extracranial carotid and vertebral arteries; disorders of the pituitary gland; disorders of the spinal cord, meninges, and vertebral column, including those which may require treatment by spinal fusion or instrumentation; and disorders of the cranial and spinal nerves throughout their distribution.

Neurological Surgery

NUCC Taxonomy Code: 207T00000X

License # reported to NPPES MI 4301109314

A neurological surgeon provides the operative and non-operative management (i.e., prevention, diagnosis, evaluation, treatment, critical care, and rehabilitation) of disorders of the central, peripheral, and autonomic nervous systems, including their supporting structures and vascular supply; the evaluation and treatment of pathological processes which modify function or activity of the nervous system; and the operative and non-operative management of pain. A neurological surgeon treats patients with disorders of the nervous system; disorders of the brain, meninges, skull, and their blood supply, including the extracranial carotid and vertebral arteries; disorders of the pituitary gland; disorders of the spinal cord, meninges, and vertebral column, including those which may require treatment by spinal fusion or instrumentation; and disorders of the cranial and spinal nerves throughout their distribution.

Student in an Organized Health Care Education/Training Program

NUCC Taxonomy Code: 390200000X

License # reported to NPPES OH 0000000

An individual who is enrolled in an organized health care education/training program leading to a degree, certification, registration, and/or licensure to provide health care.

Check License Status with the State Board License numbers are self-reported to NPPES; T-MedInfo does not confirm them against state records. Current status: Oklahoma State Board of Medical Licensure.
Look Up on State Board Site

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid ID
200715920A (OK)

Medicare (PECOS) Enrollment & Ordering Eligibility

Source: CMS PECOS
Medicare FFS Enrollment Status Medicare Enrollment on File
CMS Provider Specialty

PRACTITIONER - NEUROSURGERY

Medicare Enrollment ID

I20170616000660

Enrollment State Jurisdiction

OK

PECOS Control ID

2365674876

Medicare Order & Referring Eligibility
Clinical Lab & Imaging (Part B) Eligible
Durable Medical Equipment (DME) Eligible
Home Health Agency (HHA) Eligible
Power Mobility Devices (PMD) Eligible

Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.

Medicare Group Practice Enrollments

Source: CMS Doctors and Clinicians National Downloadable File

Oklahoma Spine And Brain Institute Llp

6802 S Olympia Ave, Tulsa, OK 741321826

Phone: 9187490762

Clinicians Sharing This Practice Address or Phone

Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.

8 listed
NPI 1235190943

Doctor of Medicine (M.D.)

Dr. Steve Gaede , MD

Neurological Surgery

NPI 1730141060

Doctor of Medicine (M.D.)

Philip Lehr , APRN, CNP

Nurse Practitioner

NPI 1962632539

Advanced Practice Registered Nurse, Certified Nurse Practitioner

Dr. Amy Nelson , PT, DPT

Physical Therapist

NPI 1750673489

Physical Therapist, Doctor of Physical Therapy

Jared Ridenour , PA

Physician Assistant

NPI 1619441177

Physician Assistant

Dr. Michael Thambuswamy , MD

Neurological Surgery

NPI 1134369556

Doctor of Medicine (M.D.)

Career & Practice History Timeline

Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status

9 Historical Events
📍
Updated Practice Location October 07, 2020

Registered at 6802 S OLYMPIA AVE, SUITE #300, TULSA, OK 741321826 (Tel: 9187490762)

📍
Updated Business Mailing Address October 07, 2020

Registered at 6802 S OLYMPIA AVE, SUITE #300, TULSA, OK 741321826 (Tel: 9187490762)

👤
Provider Name / Credentials Updated October 07, 2020

Recorded as DANIEL HARWELL, M.D.

✅
NPI Profile Active June 13, 2016

NPI status registered as active in NPPES database

📍
Practice Location (Initial Record) June 13, 2016

Registered at 1500 EAST MEDICAL CENTER DRIVE, 2ND FLOOR TAUBMAN CENTER RECP G, ANN ARBOR, MI 481095338 (Tel: 7349367010)

📍
Business Mailing Address (Initial Record) June 13, 2016

Registered at 3621 SOUTH STATE STREET, 700 KMS PLACE, ANN ARBOR, MI 48108 (Tel: 7349362047)

👤
Provider Name / Credentials (Initial Record) June 13, 2016

Recorded as DANIEL HARWELL, MD

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) June 13, 2016

Neurological Surgery (license number reported to NPPES: MI 4301109314)

🟢
Initial NPI Registration & Enumeration April 29, 2010

First registered as active Individual Practitioner in NPPES Database.

No reviews have been published yet. Leave a review.

NPI Administrative Meta

NPI Number: 1679890701
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: April 29, 2010
Last Update: October 07, 2020
Sole Proprietor: No

Other Neurological Surgery Specialists in Tulsa

All Neurological Surgery Specialists in Tulsa

Mailing Address

6802 S Olympia Ave, Suite #300

Tulsa, OK 741321826

Phone: 9187490762

About This Data NPPES fields (address, phone, specialty, license) are self-reported and may be outdated; Medicare fields follow the CMS dataset named in each section. Correct directly at NPPES.