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DR. SIAMAK MALEK M.D.
NPI 1174716286
Internal Medicine in Boston, MA

Active since August 22, 2007PECOS Enrolled
165 CAMBRIDGE ST, 5TH FLOOR, BOSTON, MA 02114(617) 726-4900 Get Directions Write a Review

NPPES record last updated: April 7, 2017. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Siamak Malek M.d. NPPES

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

DR. SIAMAK MALEK M.D. (NPI 1174716286) is an individual internal medicine provider in Boston, Massachusetts, licensed in Pennsylvania (MD434166) and active in the NPI registry since August 2007. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1174716286
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. SIAMAK MALEKCredential: M.D.
Location Address165 CAMBRIDGE ST, 5TH FLOORBoston, MA 02114-2783
Mailing Address165 Cambridge St, 5th FloorBoston, MA 02114-2783 · (617) 726-4900
Phone(617) 726-4900
Sole ProprietorNo
Enumeration DateAugust 22, 2007
Last NPPES UpdateApril 7, 2017
✔ NPI 1174716286 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in PA · MD434166
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.
165 CAMBRIDGE ST, Boston, MA 02114
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Taro Health.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Siamak Malek 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 Reassignments

3

Medicare enrollment records show Siamak Malek reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

The General Hospital Corporation
0.2 mi
General Acute Care Hospital
55 FRUIT ST, BULFINCH 360
Boston, MA 02114
  • Reassigned Medicare billing, Massachusetts enrollment
  • 6,234 clinicians in this Medicare group
NPI 1023049236 (617) 726-2000
Massachusetts General Physicians Organization Inc
0.2 mi
Dermatology
55 FRUIT ST, BUL 2
Boston, MA 02114
  • Reassigned Medicare billing, Massachusetts enrollment
  • 6,360 clinicians in this Medicare group
NPI 1801874573 (617) 724-0287
Rosebud Indian Health Service
1,508 mi
General Acute Care Hospital
400 SOLDIER CREEK ROAD
Rosebud, SD 57570
  • Reassigned Medicare billing, Texas enrollment
  • 386 clinicians in this Medicare group
NPI 1194757369 (605) 747-3245

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 2

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.
26 services25 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
16 services15 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02114 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
$144.11 typical visit price
range $63.72 – $189.86
Typical copayment $36.02 (range $15.93 – $47.46)
Most-billed visit code 99204
Established Patient
$111.18 typical visit price
range $21.07 – $155.29
Typical copayment $27.79 (range $5.26 – $38.82)
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 8

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

Lancets, per box of 100 A4259
DME-Medical/Surgical Supplies · category DA000N
7 suppliers11 claims12 services$1.07 avg. paid by Medicare
Tubing with integrated heating element for use with positive airway pressure device A4604
DME-Other DME · category DE001N
4 suppliers13 claims13 services$35.20 avg. paid by Medicare
Nasal interface (mask or cannula type) used with positive airway pressure device, with or without head strap A7034
DME-Other DME · category DE001N
4 suppliers19 claims19 services$47.73 avg. paid by Medicare
Headgear used with positive airway pressure device A7035
DME-Other DME · category DE001N
5 suppliers14 claims14 services$16.39 avg. paid by Medicare
Filter, disposable, used with positive airway pressure device A7038
DME-Other DME · category DE001N
5 suppliers19 claims114 services$1.97 avg. paid by Medicare
Enteral feeding supply kit; pump fed, per day, includes but not limited to feeding/flushing syringe, administration set tubing, dressings, tape B4035
Other-Enteral and Parenteral · category OB006N
1 supplier11 claims330 services$4.28 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 20

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

MARY BATES RN
Registered Nurse (Ambulatory Care)
165 CAMBRIDGE ST, MGH CROHN'S AND COLITIS CENTER
BOSTON, MA 02114
Suffolk County (617) 643-5524
DR. THOMAS JOSEPH BRADY MD
Nuclear Medicine
165 CAMBRIDGE ST, SUITE 400
BOSTON, MA 02114
Suffolk County (617) 726-8313
DR. ELIZABETH A FRIEDLANDER NP, PHD
Nurse Practitioner
165 CAMBRIDGE ST, GI ASSOCIATES AT CHARLES RIVER PLAZA, 9TH FLOOR
BOSTON, MA 02114
Suffolk County (617) 724-6038
ASHIMA CHADHA MD
Internal Medicine (Nephrology)
165 CAMBRIDGE ST
BOSTON, MA 02114
Suffolk County (617) 724-4100
EIMAN GHAFFARPASAND MD
Surgery (Trauma Surgery)
165 CAMBRIDGE ST
BOSTON, MA 02114
Suffolk County (617) 726-4900
MS. JANE LESLIE TAUB N.P.
Nurse Practitioner (Adult Health)
165 CAMBRIDGE ST
BOSTON, MA 02114
Suffolk County (617) 726-3373
EMILY GELSOMIN RD, LDN
Dietitian, Registered
165 CAMBRIDGE ST, SUITE 402
BOSTON, MA 02114
Suffolk County (617) 726-2779
RICHARD BRANDOLINI
Nurse Practitioner (Family)
165 CAMBRIDGE ST, CHARLES RIVER PLAZA, SUITE 404
BOSTON, MA 02114
Suffolk County (617) 724-3910

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 Siamak Malek's NPI number?

The NPI number for Siamak Malek is 1174716286. It was assigned to this individual provider in the NPPES registry on August 22, 2007.

Where is Siamak Malek located?

Siamak Malek practices at 165 Cambridge St 5th Floor, Boston, MA 02114. The listed phone number is (617) 726-4900.

What is Siamak Malek's specialty?

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

Is Siamak Malek enrolled in Medicare?

Yes. Siamak Malek is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Siamak Malek's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Siamak Malek reassigns Medicare benefits to 3 organizations: The General Hospital Corporation (Boston, MA), Massachusetts General Physicians Organization Inc (Boston, MA) and Rosebud Indian Health Service (Rosebud, SD). 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 Siamak Malek's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Siamak Malek accept?

Health plans from Taro Health list Siamak Malek 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.

When was this NPI record last updated?

The NPPES record for Siamak Malek was last updated on April 7, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.