1. Home
  2. Directory
  3. Massachusetts
  4. Lynn
  5. Internal Medicine
  6. NPI Profile

OLIVER GREGORY M.D.
NPI 1154768281
Internal Medicine in Lynn, MA

Active since May 30, 2013PECOS EnrolledAccepts Medicare Assignment
496 LYNNFIELD ST, LYNN, MA 01904(781) 593-3400 Get Directions Write a Review

NPPES record last updated: June 28, 2016. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jun 28, 2016, Feb 19, 2016 (2 updates tracked since 2016).

About Oliver Gregory M.d. NPPES

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

OLIVER GREGORY M.D. (NPI 1154768281) is an individual internal medicine provider in Lynn, Massachusetts, licensed in Massachusetts (265504) and active in the NPI registry since May 2013. He is enrolled in Medicare PECOS, is affiliated with North Shore Medical Center -, and is a graduate of University Of Massachusetts Medical School (2013).

NPPES Registry Identity

NPI1154768281
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameOLIVER GREGORYCredential: M.D.
Location Address496 LYNNFIELD STLynn, MA 01904-1423
Mailing Address81 Highland AveSalem, MA 01970-2714 · (978) 573-4300
Phone(781) 593-3400
Sole ProprietorYes
Medical School CMSUniversity Of Massachusetts Medical SchoolGraduated 2013
Enumeration DateMay 30, 2013
Last NPPES UpdateJune 28, 20162 updates tracked since enumeration
✔ NPI 1154768281 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Licenses✔ Licensed in MA · 265504✔ Licensed in RI · LP02789
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
496 LYNNFIELD ST, Lynn, MA 01904
Open in Google Maps ↗

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

Oliver Gregory 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 ID6406072297
PECOS Enrollment IDI20161007000743
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

2

Medicare enrollment records show Oliver Gregory reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Mass General Brigham Medical Group Northern Massachusetts Inc
3.8 mi
Emergency Medicine
81 HIGHLAND AVE
Salem, MA 01970
  • Reassigned Medicare billing, Massachusetts enrollment
  • 994 clinicians in this Medicare group
NPI 1588606123 (978) 354-4173
Physicians Services Group, P.C.
808 mi
Multi-Specialty
2 GRIFFITH RD
Greenville, SC 29607
  • Reassigned Medicare billing, South Carolina enrollment
  • Medicare enrollment name: Physicians Services Group PC
  • 80 clinicians in this Medicare group
NPI 1700357076 (864) 688-3988

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 9

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.
480 services266 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
126 services126 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
95 services69 patients
Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes 99309
A follow-up nursing facility visit per day is a daily check-in by a healthcare professional. This 25-minute visit typically involves monitoring your health progress, addressing any concerns, and adjusting treatment plans as necessary. It's a vital part of ensuring your ongoing wellbeing.
38 services14 patients
Transitional care management services for problem of at least moderate complexity 99495
Transitional care management services focus on coordinating and managing your care after you leave the hospital. For moderate complexity problems, this involves managing your medications, arranging further treatments, and ensuring you have the necessary follow-ups.
27 services23 patients
Telephone medical discussion with physician, 21-30 minutes 99443
This service involves a 21-30 minute phone conversation with a physician. It's a chance for you to discuss your health concerns, symptoms or treatment plans. It's similar to an in-person consultation, but conducted over the phone for your convenience and safety.
22 services15 patients

Hospital Affiliations CMS Care Compare 4

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

North Shore Medical Center -

Acute Care Hospitals · Salem, MA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220035
Location81 Highland AvenueSalem, MA 01970 · Essex County
Emergency services Birthing friendly

Massachusetts General Hospital

Acute Care Hospitals · Boston, MA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220071
Location55 Fruit StreetBoston, MA 02114 · Suffolk County
Emergency services Birthing friendly

Lahey Hospital & Medical Center, Burlington

Acute Care Hospitals · Burlington, MA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220171
Location41 & 45 Mall RoadBurlington, MA 01803 · Middlesex County
Emergency services

Union Medical Center

Acute Care Hospitals · Union, SC
OwnershipVoluntary non-profit - Other
CMS Certification Number420108
Location322 West South StreetUnion, SC 29379 · Union County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 01904 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
$134.47 typical visit price
range $58.86 – $177.36
Typical copayment $33.61 (range $14.71 – $44.34)
Most-billed visit code 99204
Established Patient
$103.48 typical visit price
range $19.11 – $144.84
Typical copayment $25.87 (range $4.77 – $36.21)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims 3

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
13 suppliers35 claims66 services$6.18 avg. paid by Medicare
Lancets, per box of 100 A4259
DME-Medical/Surgical Supplies · category DA000N
9 suppliers13 claims13 services$1.04 avg. paid by Medicare
Pharmacy dispensing fee for inhalation drug(s); per 30 days Q0513
DME-Other DME · category DE000N
5 suppliers16 claims16 services$26.07 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 19

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

EDWARD M BRAUN MD
Internal Medicine
496 LYNNFIELD ST
LYNN, MA 01904
Essex County (781) 593-3400
PETER R SHECKMAN MD
Internal Medicine (Infectious Disease)
496 LYNNFIELD ST
LYNN, MA 01904
Essex County (781) 593-3400
MR. STEVEN LEFKOWITZ M.D.
Internal Medicine (Cardiovascular Disease)
496 LYNNFIELD ST, SUITE 104
LYNN, MA 01904
Essex County (781) 586-9300
LAURA BEEGHLY MD
Internal Medicine
496 LYNNFIELD ST
LYNN, MA 01904
Essex County (781) 593-3400
CRAIG A GRIMES MD
Internal Medicine
496 LYNNFIELD ST
LYNN, MA 01904
Essex County (781) 593-3400
SHELDON J SEVINOR MD
Plastic Surgery
496 LYNNFIELD ST, SUITE 103
LYNN, MA 01904
Essex County (781) 592-3632
PLASTIC SURGERY SERVICES PC
Plastic Surgery
496 LYNNFIELD ST, STE 103 WEST MEDICAL BLDG
LYNN, MA 01904
Essex County (781) 592-3632
ALIS G GABRIEL MD
Internal Medicine (Pulmonary Disease)
496 LYNNFIELD ST
LYNN, MA 01904
Essex County (781) 593-3400

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 Oliver Gregory's NPI number?

The NPI number for Oliver Gregory is 1154768281. It was assigned to this individual provider in the NPPES registry on May 30, 2013.

Where is Oliver Gregory located?

Oliver Gregory practices at 496 Lynnfield St, Lynn, MA 01904. The listed phone number is (781) 593-3400.

What is Oliver Gregory's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Oliver Gregory enrolled in Medicare?

Yes. Oliver Gregory 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 Oliver Gregory's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Oliver Gregory reassigns Medicare benefits to 2 organizations: Mass General Brigham Medical Group Northern Massachusetts Inc (Salem, MA) and Physicians Services Group, P.C. (Greenville, SC). 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 Oliver Gregory's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Oliver Gregory affiliated with any hospitals?

According to CMS data, Oliver Gregory is affiliated with North Shore Medical Center -, Massachusetts General Hospital, Lahey Hospital & Medical Center, Burlington and Union Medical Center.

When was this NPI record last updated?

The NPPES record for Oliver Gregory was last updated on June 28, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.