DR. ROBERT TRISTIAN ISOM M.D.
NPI 1356428072
Internal Medicine - Nephrology in Portland, ME

Active since November 01, 2006PECOS EnrolledAccepts Medicare Assignment
1600 CONGRESS ST STE B, PORTLAND, ME 04102(207) 774-5222 Get Directions Write a Review

NPPES record last updated: May 24, 2022. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Robert Tristian Isom M.d. NPPES

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

DR. ROBERT TRISTIAN ISOM M.D. (NPI 1356428072) is an individual nephrology provider in Portland, Maine, licensed in Maine (MD25822) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS and is a graduate of Columbia University College Of Physicians And Surgeons (1997).

NPPES Registry Identity

NPI1356428072
Entity TypeIndividualMale
Primary Taxonomy207RN0300X
Provider Legal NameDR. ROBERT TRISTIAN ISOMCredential: M.D.
Location Address1600 CONGRESS ST STE BPortland, ME 04102-2148
Mailing Address1600 Congress St Ste BPortland, ME 04102-2148
Sole ProprietorNo
Medical School CMSColumbia University College Of Physicians And SurgeonsGraduated 1997
Enumeration DateNovember 1, 2006
Last NPPES UpdateMay 24, 2022
NPPES CertifiedMay 24, 2022
NPI 1356428072 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
Licenses Licensed in ME · MD25822 Licensed in NY · 217627
Definition
An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.
1600 CONGRESS ST STE B, Portland, ME 04102

Other Identifiers 1

Medicaid02423449NY

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Dr. Robert Tristian Isom 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 ID8224928155
PECOS Enrollment IDI20110324000661
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.

Areas of Expertise CMS Part B claims 18

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.

Injection, epoetin alfa, (for non-esrd use), 1000 units J0885
Epoetin alfa is a medication injected to help your body produce more red blood cells, improving energy levels and reducing tiredness. It's often used for patients with certain types of anemia. Each injection contains 1000 units of the medicine.
2,290 services21 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.
491 services247 patients
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.
245 services152 patients
Injection of drug or substance under skin or into muscle 96372
This procedure involves administering medication directly under the skin or into a muscle. A small needle is used to inject the drug, allowing it to be absorbed quickly into the bloodstream. It's a common method for delivering a variety of medications.
148 services27 patients
Insertion of needle into vein for collection of blood sample 36415
This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.
128 services82 patients
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
122 services122 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 04102 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
$128.83 typical visit price
range $56.28 – $169.96
Typical copayment $32.20 (range $14.07 – $42.49)
Most-billed visit code 99204
Established Patient
$99.18 typical visit price
range $18.22 – $138.92
Typical copayment $24.79 (range $4.55 – $34.73)
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 4

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

Tacrolimus, immediate release, oral, 1 mg J7507
Treatment-Treatment - Miscellaneous · category RX029N
2 suppliers35 claims3,240 services$0.30 avg. paid by Medicare
Mycophenolate mofetil, oral, 250 mg J7517
Treatment-Treatment - Miscellaneous · category RX029N
4 suppliers33 claims3,180 services$0.19 avg. paid by Medicare
Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for the first prescription in a 30-day period Q0511
Treatment-Chemotherapy · category RH012N
4 suppliers42 claims42 services$17.20 avg. paid by Medicare
Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for a subsequent prescription in a 30-day period Q0512
Treatment-Chemotherapy · category RH012N
3 suppliers40 claims40 services$12.04 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 13

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

Internal Medicine (Nephrology)
1600 CONGRESS ST STE B
PORTLAND, ME 04102
Dietitian, Registered
1600 CONGRESS ST STE B
PORTLAND, ME 04102
Physician Assistant
1600 CONGRESS ST STE B
PORTLAND, ME 04102
Physician Assistant
1600 CONGRESS ST STE B
PORTLAND, ME 04102
Internal Medicine (Nephrology)
1600 CONGRESS ST STE B
PORTLAND, ME 04102
Internal Medicine (Nephrology)
1600 CONGRESS ST STE B
PORTLAND, ME 04102
Nurse Practitioner (Acute Care)
1600 CONGRESS ST STE B
PORTLAND, ME 04102
Nurse Practitioner (Acute Care)
1600 CONGRESS ST STE B
PORTLAND, ME 04102

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 Robert Isom's NPI number?

The NPI number for Robert Isom is 1356428072. It was assigned to this individual provider in the NPPES registry on November 1, 2006.

Where is Robert Isom located?

Robert Isom practices at 1600 Congress St Ste B, Portland, ME 04102. The listed phone number is (207) 774-5222.

What is Robert Isom's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Is Robert Isom enrolled in Medicare?

Yes. Robert Isom 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.

When was this NPI record last updated?

The NPPES record for Robert Isom was last updated on May 24, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.