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GREGORY DOUGLAS PHILLIPS MD
NPI 1588020507
Psychiatry & Neurology - Neurology in Apo, AE

Active since January 06, 2016PECOS EnrolledAccepts Medicare Assignment

NPPES record last updated: October 2, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Jun 4, 2024, Oct 30, 2022, Sep 15, 2022 and 1 more (4 updates tracked since 2020).

About Gregory Douglas Phillips Md NPPES

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

GREGORY DOUGLAS PHILLIPS MD (NPI 1588020507) is an individual neurology provider in Apo, AE, licensed in Indiana (01079222A) and active in the NPI registry since January 2016. He is enrolled in Medicare PECOS, is affiliated with Mercy Medical Center Inc, and maintains 3 additional practice locations.

NPPES Registry Identity

NPI1588020507
Entity TypeIndividualMale
Primary Taxonomy2084N0400X
Provider Legal NameGREGORY DOUGLAS PHILLIPSCredential: MD
Location AddressUNIT 33100Apo, AE 09180-3100
Mailing AddressUnit 33100Apo, AE 09180-3100 · (314) 590-7735
Phone(314) 590-7735
Sole ProprietorNo
Medical School CMSUniversity Of Utah School Of MedicineGraduated 2016
Enumeration DateJanuary 6, 2016
Last NPPES UpdateOctober 2, 20254 updates tracked since enumeration
NPPES CertifiedOctober 2, 2025
✔ NPI 1588020507 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPsychiatry & Neurology · NeurologyAllopathic & Osteopathic Physicians
Taxonomy Code2084N0400X
License✔ Licensed in IN · 01079222A
Definition
A Neurologist specializes in the diagnosis and treatment of diseases or impaired function of the brain, spinal cord, peripheral nerves, muscles, autonomic nervous system, and blood vessels that relate to these structures.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X

Secondary Practice Locations 3

Location 110900 NE 4th St Ste 2300Bellevue, WA 98004-5882 · Phone (412) 406-7692
Location 29040 Fitzsimmons DrJoint Base Lewis McChord, WA 98431-1000 · Phone (253) 968-1399
Location 3206 S Coronado AveEspanola, NM 87532-2792 · Phone (412) 406-7692

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

Gregory Douglas Phillips Md 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 ID3072855444
PECOS Enrollment IDI20221018002086, I20221018002849, I20221028001743, I20221028002060, I20221118001195, I20230327002861, I20230609000344
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 Gregory Phillips reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Surgical Neuromonitoring,pllc
Electrodiagnostic Medicine
10900 NE 4TH ST STE 2300
Bellevue, WA 98004
  • Reassigned Medicare billing, Maryland, Oregon, Pennsylvania, South Carolina, Virginia, Washington and West Virginia enrollments
  • 7 clinicians in this Medicare group
NPI 1124338025 (412) 406-7692

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 8

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.

Placement of skin electrodes and measurement of stimulated sites on arms and legs 95938
This procedure involves placing small pads (electrodes) on your arms and legs. These electrodes send gentle electric signals to specific areas, and the responses are measured. This helps assess the health of your nerves and muscles.
337 services334 patients
Needle measurement of electrical activity in arm or leg muscles, 2 extremities 95861
This procedure, known as an electromyography (EMG), involves inserting a small needle into your arm or leg muscles to measure their electrical activity. It helps diagnose conditions affecting nerves or muscles. It's generally painless, though you may feel some discomfort.
202 services201 patients
Needle measurement of electrical activity in arm, leg, trunk or head muscles, limited study 95870
This procedure, known as an electromyography (EMG), involves using a needle to measure electrical activity in your muscles. It can help diagnose conditions affecting nerves or muscles. It's a limited study, meaning only specific muscles in the arm, leg, trunk, or head are examined.
129 services66 patients
Measurement of brain wave activity (eeg) outside the brain during surgery 95955
An EEG (Electroencephalogram) during surgery monitors brain activity. Electrodes on the scalp record brain wave patterns, helping doctors ensure the brain is functioning normally throughout the procedure.
127 services126 patients
Placement of skin electrodes and measurement of central motor stimulation in arms and legs 95939
This procedure involves placing small patches (electrodes) on your skin over your arms and legs. These electrodes send harmless electrical signals to your muscles. The response is measured to assess the health and function of your nerves and muscles.
82 services81 patients
Continuous intraoperative neurophysiology monitoring, from outside the operating room (remote or nearby), per patient, (attention directed exclusively to one patient) each 15 minutes (list in addition to primary procedure) G0453
Continuous intraoperative neurophysiology monitoring is a service where a specialist oversees your nervous system's function during surgery, from a nearby or remote location. This is done every 15 minutes and is focused solely on you. It helps ensure surgical safety by identifying any potential nervous system changes promptly.
79 services13 patients

Hospital Affiliations CMS Care Compare 5

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

Mercy Medical Center Inc

Acute Care Hospitals · Baltimore, MD
4/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number210008
Location301 Saint Paul PlaceBaltimore, MD 21202 · Baltimore City County
Emergency services Birthing friendly

Tidalhealth Peninsula Regional, Inc

Acute Care Hospitals · Salisbury, MD
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number210019
Location100 East Carroll AvenueSalisbury, MD 21801 · Wicomico County
Emergency services Birthing friendly

University Of MD Shore Medical Center At Easton

Acute Care Hospitals · Easton, MD
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number210037
Location219 South Washington StreetEaston, MD 21601 · Talbot County
Emergency services

Umd Upper Chesapeake Medical Center

Acute Care Hospitals · Bel Air, MD
2/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number210049
Location500 Upper Chesapeake DriveBel Air, MD 21014 · Harford County
Emergency services Birthing friendly

University Of MD St Joseph Medical Center

Acute Care Hospitals · Towson, MD
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number210063
Location7601 Osler DriveTowson, MD 21204 · Baltimore County
Emergency services Birthing friendly

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.

DR. SHAHIN NASSIRKHANI MD
Radiology (Nuclear Radiology)
UNIT 33100
APO, AE 09180
(314) 590-6986
STANLEY T BREUER OTR/L, CHT
Occupational Therapist (Hand)
UNIT 33100
APO, AE 09180
(314) 590-7163
MRS. LARA LYNN SPIRNAK
Nurse Practitioner (Family)
UNIT 33100
APO, AE 09180
(314) 590-5762
DR. NICOLETA GRIGORAS
Physical Therapist (Pediatrics)
UNIT 33100
APO, AE 09180
(314) 590-8298
MEGAN BUEHLER-BRAZAS PMHNP
Nurse Practitioner (Psychiatric/Mental Health)
UNIT 33100
APO, AE 09180
(913) 704-9132
JACQUELINE MAY TAMAYO OT
Occupational Therapist
UNIT 33100
APO, AE 09180
(314) 590-4077
LYNDON BART CHUMBLEY MD
Psychiatry & Neurology (Neurology)
UNIT 33100
APO, AE 09180
(314) 590-7028
DR. JOANNA HESKETT PHARMD
Pharmacist
UNIT 33100
APO, AE 09180
(314) 590-3225

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 Gregory Phillips's NPI number?

The NPI number for Gregory Phillips is 1588020507. It was assigned to this individual provider in the NPPES registry on January 6, 2016.

Where is Gregory Phillips located?

Gregory Phillips practices at Unit 33100, Apo, AE 09180. The listed phone number is (314) 590-7735.

What is Gregory Phillips's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Neurology, with taxonomy code 2084N0400X.

Is Gregory Phillips enrolled in Medicare?

Yes. Gregory Phillips 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 organization bills Medicare for Gregory Phillips's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Phillips reassigns Medicare benefits to Surgical Neuromonitoring,pllc (Bellevue, WA). 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 Gregory Phillips's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Gregory Phillips affiliated with any hospitals?

According to CMS data, Gregory Phillips is affiliated with Mercy Medical Center Inc, Tidalhealth Peninsula Regional, Inc, University Of MD Shore Medical Center At Easton, Umd Upper Chesapeake Medical Center and University Of MD St Joseph Medical Center.

When was this NPI record last updated?

The NPPES record for Gregory Phillips was last updated on October 2, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.