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JJM MEDICAL SERVICES, PC
NPI 1952548265
Anesthesiology in Waltham, MA

Active since January 09, 2009
1440 MAIN ST, WALTHAM, MA 02451(781) 891-9300(617) 440-2880 Get Directions Write a Review

NPPES record last updated: September 17, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 17, 2024, Sep 13, 2024 (2 updates tracked since 2024).

About Jjm Medical Services, Pc NPPES

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

JJM MEDICAL SERVICES, PC (NPI 1952548265) is a healthcare organization registered as an anesthesiology in Waltham, Massachusetts and active in the NPI registry since January 2009. The organization lists Juan J Mallari, President, as its authorized official.

NPPES Registry Identity

NPI1952548265
Entity TypeOrganization
Primary Taxonomy207L00000X
Legal Business NameJJM MEDICAL SERVICES, PC
Location Address1440 MAIN STWaltham, MA 02451-1631
Mailing AddressPo Box 986520 Department 310Boston, MA 02298-6520 · (207) 784-2554 · Fax (207) 777-1439
Phone(781) 891-9300
Fax(617) 440-2880
Organization SubpartNo
Authorized OfficialJuan J MallariPresident · (617) 455-2247
Enumeration DateJanuary 9, 2009
Last NPPES UpdateSeptember 17, 20242 updates tracked since enumeration
NPPES CertifiedSeptember 17, 2024
✔ NPI 1952548265 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
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.
1440 MAIN ST, Waltham, MA 02451
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Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Jjm Medical Services, Pc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

120

Medicare enrollment records show 120 clinicians reassign Medicare billing to Jjm Medical Services, PC, which bills Medicare for the services they deliver. Of these, 1 practice at this address and 14 within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 3

Certified Registered Nurse Anesthetist (CRNA)63
Anesthesiology56
Pain Management1

Nearest to this location (20)

See all 120
Juan Mallari, MD
Anesthesiology
NPI 1508834854
1440 MAIN STREET
Waltham, MA 02451
(781) 891-9300
✔ PECOS✔ Accepts MedicareSame address
Rebecca Leong, M.D.
Anesthesiology
NPI 1922089952
22 WESTWAY RD
Wayland, MA 01778
(508) 358-3432
✔ PECOS✔ Accepts Medicare3.3 mi
Deborah Reich, MD
Anesthesiology
NPI 1609807528
2014 WASHINGTON ST DEPT OF ANESTHESIA
Newton, MA 02462
(617) 243-6298
✔ PECOS✔ Accepts Medicare3.4 mi
Limor Graham, M.D.
Anesthesiology
NPI 1669597472
197 WALNUT ST #2
Newton, MA 02460
(617) 669-4930
✔ PECOS✔ Accepts Medicare3.7 mi
Adrian Gollas, M.D.
Anesthesiology
NPI 1285794784
175 WORCESTER ST
Wellesley, MA 02481
(832) 378-0698
✔ PECOS4.4 mi
Raimis Matulionis, MD
Anesthesiology
NPI 1437149804
736 CAMBRIDGE ST
Boston, MA 02135
(617) 789-2189
✔ PECOS✔ Accepts Medicare6.7 mi
Usha Vellayappan, MD
Anesthesiology
NPI 1699760538
736 CAMBRIDGE ST DEPT OF ANESTHESIOLOGY CMP 2
Brighton, MA 02135
(617) 789-2777
✔ PECOS✔ Accepts Medicare6.7 mi
Alexia Caprio, CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1063728343
133 OLD ROAD TO NINE ACRE CORNER
Concord, MA 01742
(401) 749-1654
✔ PECOS✔ Accepts Medicare7.4 mi
Nathaniel Van Heuveln
Certified Registered Nurse Anesthetist (CRNA)
NPI 1518469675
1400 VFW PKWY
West Roxbury, MA 02132
(617) 323-7700
✔ PECOS✔ Accepts Medicare8.7 mi
Michael Butera, CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1710077276
1400 VFW PARKWAY
W. Roxbury, MA 02132
(617) 323-7700
✔ PECOS✔ Accepts Medicare8.8 mi
Dongdong Yao, M.D., PH.D.
Anesthesiology
NPI 1801088174
75 FRANCIS ST
Boston, MA 02115
(617) 732-8218
✔ PECOS✔ Accepts Medicare9.0 mi
Sarah Toczylowski
Certified Registered Nurse Anesthetist (CRNA)
NPI 1033547351
1153 CENTRE ST
Jamaica Plain, MA 02130
(617) 983-7972
✔ PECOS✔ Accepts Medicare9.0 mi
Michael Mcsweeney, CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1437543956
1153 CENTRE ST
Jamaica Plain, MA 02130
(617) 983-7000
✔ PECOS9.0 mi
Heba Hanna, D.O.
Anesthesiology
NPI 1972548196
115 LINCOLN ST
Framingham, MA 01702
(508) 875-1600
✔ PECOS✔ Accepts Medicare9.8 mi
John Camuso, CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1316288715
243 CHARLES ST
Boston, MA 02114
(617) 523-7900
✔ PECOS✔ Accepts Medicare10 mi
Makara Cayer, M.D.
Anesthesiology
NPI 1487858635
243 CHARLES ST
Boston, MA 02114
(617) 573-3380
✔ PECOS✔ Accepts Medicare10 mi
Catherine Mullaly, MD
Anesthesiology
NPI 1790753499
243 CHARLES ST
Boston, MA 02114
(617) 573-3380
✔ PECOS✔ Accepts Medicare10 mi
Peng Xiao, MD
Anesthesiology
NPI 1073509782
243 CHARLES ST
Boston, MA 02114
(617) 573-3380
✔ PECOS✔ Accepts Medicare10 mi
Jeremy Jackson
Certified Registered Nurse Anesthetist (CRNA)
NPI 1912313461
55 FRUIT ST DEPARTMENT OF ANESTHESIA
Boston, MA 02114
(617) 726-2000
✔ PECOS10 mi
Jeffrey Jackel, MD
Pain Management
NPI 1215915327
639 GRANITE ST STE 215
Braintree, MA 02184
(781) 817-5383
✔ PECOS✔ Accepts Medicare17 mi
See all 120 clinicians

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 Jjm Medical Services, PC's NPI number?

The NPI number for Jjm Medical Services, PC is 1952548265. It was assigned to this organization in the NPPES registry on January 9, 2009.

Where is Jjm Medical Services, PC located?

Jjm Medical Services, PC is located at 1440 Main St, Waltham, MA 02451. The listed phone number is (781) 891-9300.

What is Jjm Medical Services, PC's specialty?

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

Is Jjm Medical Services, PC enrolled in Medicare?

Yes. Jjm Medical Services, PC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Jjm Medical Services, PC?

According to the CMS Revalidation Reassignment List (October 2026 release), 120 clinicians in 3 Medicare specialties reassign their Medicare billing to Jjm Medical Services, PC. A 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 the clinician's services. The largest specialties are Certified Registered Nurse Anesthetist (CRNA) (63), Anesthesiology (56) and Pain Management (1). Of these, 1 practice at this address and 14 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Jjm Medical Services, PC was last updated on September 17, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.