MARGARET MACGREGOR M.D.
NPI 1679665541
Neurological Surgery in Nashville, TN

Active since September 29, 2006PECOS EnrolledAccepts Medicare Assignment
3638 RICHLAND AVE, NASHVILLE, TN 37205(217) 652-6267 Get Directions Write a Review

NPPES record last updated: July 28, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jul 28, 2026, Apr 27, 2026 (2 updates tracked since 2026).

About Margaret Macgregor M.d. NPPES

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

MARGARET MACGREGOR M.D. (NPI 1679665541) is an individual neurological surgery provider in Nashville, Tennessee, licensed in Tennessee (55149) and active in the NPI registry since September 2006. She is enrolled in Medicare PECOS, is affiliated with Anmed Health, and is a graduate of Other (1992).

NPPES Registry Identity

NPI1679665541
Entity TypeIndividualFemale
Primary Taxonomy207T00000X
Provider Legal NameMARGARET MACGREGORCredential: M.D.
Location Address3638 RICHLAND AVENashville, TN 37205-2356
Mailing Address3638 Richland AveNashville, TN 37205-2356 · (217) 652-6267
Sole ProprietorNo
Medical School CMSOtherGraduated 1992
Enumeration DateSeptember 29, 2006
Last NPPES UpdateJuly 28, 20262 updates tracked since enumeration
NPPES CertifiedJuly 28, 2026
✔ NPI 1679665541 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNeurological SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code207T00000X
Licenses✔ Licensed in TN · 55149✔ Licensed in IL · 036-089375
Definition
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.
3638 RICHLAND AVE, Nashville, TN 37205

Other Identifiers 1

Medicaid03689375IL

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

Margaret Macgregor 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 ID244250751
PECOS Enrollment IDI20170421001970, I20221012001360, I20240628001552, I20260225001651
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

10

Medicare enrollment records show Margaret Macgregor reassigns Medicare billing to 10 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Radiology, Mobile Mammography
102 WOODMONT BLVD, SUITE 800
Nashville, TN 37205
  • Reassigned Medicare billing, Tennessee enrollment
  • 1,304 clinicians in this Medicare group
Internal Medicine
3024 BUSINESS PARK CIR
Goodlettsville, TN 37072
  • Reassigned Medicare billing, Kentucky enrollment
  • 4 clinicians in this Medicare group
Family Medicine
111 W PINE GROVE RD
Fair Play, SC 29643
  • Reassigned Medicare billing, South Carolina enrollment
  • 381 clinicians in this Medicare group
Internal Medicine
301 BROWN SPRINGS RD
Montgomery, AL 36117
  • Reassigned Medicare billing, Alabama enrollment
  • 439 clinicians in this Medicare group
Internal Medicine
889 ELBA HWY
Troy, AL 36079
  • Reassigned Medicare billing, Alabama enrollment
  • 514 clinicians in this Medicare group
Internal Medicine
506 NORTH ST
Bamberg, SC 29003
  • Reassigned Medicare billing, South Carolina enrollment
  • 2,389 clinicians in this Medicare group
Urgent Care
964 LOCHEND DR
Darlington, SC 29532
  • Reassigned Medicare billing, South Carolina enrollment
  • 878 clinicians in this Medicare group
Family Medicine
416 CONNABLE AVE
Petoskey, MI 49770
  • Reassigned Medicare billing, Michigan enrollment
  • 149 clinicians in this Medicare group
Neurological Surgery
613 ELIZABETH ST STE 200
Corpus Christi, TX 78404
  • Reassigned Medicare billing, Texas enrollment
  • 27 clinicians in this Medicare group
Surgery
600 ELIZABETH ST
Corpus Christi, TX 78404
  • Reassigned Medicare billing, Texas enrollment
  • 130 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 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.

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.
61 services42 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.
27 services27 patients
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
18 services18 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.
18 services15 patients

Hospital Affiliations CMS Care Compare 4

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

Anmed Health

Acute Care Hospitals · Anderson, SC
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number420027
Location800 N Fant StAnderson, SC 29621 · Anderson County
Emergency services Birthing friendly

Musc Health Florence Medical Center

Acute Care Hospitals · Florence, SC
3/5 CMS rating
OwnershipGovernment - State
CMS Certification Number420091
Location805 Pamplico Hwy Box 100550Florence, SC 29505 · Florence County
Emergency services Birthing friendly

Saint Thomas Rutherford Hospital

Acute Care Hospitals · Murfreesboro, TN
2/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number440053
Location1700 Medical Center ParkwayMurfreesboro, TN 37129 · Rutherford County
Emergency services Birthing friendly

Tristar Summit Medical Center

Acute Care Hospitals · Hermitage, TN
2/5 CMS rating
OwnershipProprietary
CMS Certification Number440150
Location5655 Frist BlvdHermitage, TN 37076 · Davidson County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 37205 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
$121.80 typical visit price
range $52.64 – $160.89
Typical copayment $30.45 (range $13.16 – $40.22)
Most-billed visit code 99204
Established Patient
$66.01 typical visit price
range $16.72 – $131.41
Typical copayment $16.50 (range $4.18 – $32.85)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Margaret Macgregor's NPI number?

The NPI number for Margaret Macgregor is 1679665541. It was assigned to this individual provider in the NPPES registry on September 29, 2006.

Where is Margaret Macgregor located?

Margaret Macgregor practices at 3638 Richland Ave, Nashville, TN 37205. The listed phone number is (217) 652-6267.

What is Margaret Macgregor's specialty?

The primary specialty registered for this NPI is Neurological Surgery with taxonomy code 207T00000X.

Is Margaret Macgregor enrolled in Medicare?

Yes. Margaret Macgregor 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 Margaret Macgregor's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Margaret Macgregor reassigns Medicare benefits to 10 organizations: Saint Thomas Medical Partners (Nashville, TN), Advanced Diagnostic Imaging, PC (Goodlettsville, TN), Anmed Health (Fair Play, SC), Health Care Authority For Baptist Health, An Affiliate Of Uabhs (Montgomery, AL), Houston County Healthcare Authority (Troy, AL) and 5 more organizations, listed in the Medicare section above. 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 Margaret Macgregor's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Margaret Macgregor accept?

Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, BlueCross BlueShield of South Carolina and Cigna Healthcare and 6 other insurers list Margaret Macgregor 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 Margaret Macgregor affiliated with any hospitals?

According to CMS data, Margaret Macgregor is affiliated with Anmed Health, Musc Health Florence Medical Center, Saint Thomas Rutherford Hospital and Tristar Summit Medical Center.

When was this NPI record last updated?

The NPPES record for Margaret Macgregor was last updated on July 28, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months 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.