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DR. NELLY K MAC M.D.
NPI 1073546750
Anesthesiology in Ventura, CA

Active since July 08, 2006PECOS Enrolled
3400 LOMA VISTA RD STE 9, VENTURA, CA 93003(805) 644-4477(805) 644-0347 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Nelly K Mac M.d. NPPES

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

DR. NELLY K MAC M.D. (NPI 1073546750) is an individual anesthesiology provider in Ventura, California, licensed in California (A32817) and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1073546750
Entity TypeIndividualFemale
Primary Taxonomy207L00000X
Provider Legal NameDR. NELLY K MACCredential: M.D.
Location Address3400 LOMA VISTA RD STE 9Ventura, CA 93003-3059
Mailing Address3400 Loma Vista Rd Ste 9Ventura, CA 93003-3059 · (805) 644-4477 · Fax (805) 644-0347
Phone(805) 644-4477
Fax(805) 644-0347
Sole ProprietorYes
Enumeration DateJuly 8, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1073546750 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in CA · A32817
Definition
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
3400 LOMA VISTA RD STE 9, Ventura, CA 93003
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Nelly K Mac M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Reassignment

Medicare enrollment records show Nelly Mac reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Ventura Anesthesia Medical Group
0.4 mi
Anesthesiology
147 N BRENT ST
Ventura, CA 93003
  • Reassigned Medicare billing, California enrollment
  • 52 clinicians in this Medicare group
NPI 1164465159 (805) 652-5044

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 Nelly Mac's NPI number?

The NPI number for Nelly Mac is 1073546750. It was assigned to this individual provider in the NPPES registry on July 8, 2006.

Where is Nelly Mac located?

Nelly Mac practices at 3400 Loma Vista Rd Ste 9, Ventura, CA 93003. The listed phone number is (805) 644-4477.

What is Nelly Mac's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is Nelly Mac enrolled in Medicare?

Yes. Nelly Mac is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Nelly Mac's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Nelly Mac reassigns Medicare benefits to Ventura Anesthesia Medical Group (Ventura, CA). The 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 Nelly Mac's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Nelly Mac was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.