MICHAEL G BERTOS M.D.
NPI 1043245145
Internal Medicine in N Chelmsford, MA

Q: What is Michael Bertos's NPI number?

The NPI number for Michael Bertos is 1043245145. It was assigned to this individual provider in the NPPES registry on July 11, 2006.

Q: What is Michael Bertos's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Michael Bertos was last updated on November 2, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.

Active since July 11, 2006PECOS EnrolledAccepts Medicare Assignment

20 RESEARCH PL, SUITE 310, N CHELMSFORD, MA 01863(978) 459-2152 Get Directions Write a Review

NPPES record last updated: November 2, 2011. Verified against the NPPES registry weekly; last sync: November 01, 2026.

On this page

About Michael G Bertos M.d. NPPES

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

MICHAEL G BERTOS M.D. (NPI 1043245145) is an individual internal medicine provider in N Chelmsford, Massachusetts, licensed in Massachusetts (160611) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with Lowell General Hospital, and is a graduate of Boston University School Of Medicine (1997).

NPPES Registry Identity

NPI1043245145

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameMICHAEL G BERTOSCredential: M.D.

Location Address20 RESEARCH PL, SUITE 310N Chelmsford, MA 01863-2454

Mailing Address20 Research Pl, Suite 310N Chelmsford, MA 01863-2454 · (978) 459-2152

Phone(978) 459-2152

Sole ProprietorNo

Medical School CMSBoston University School Of MedicineGraduated 1997

Enumeration DateJuly 11, 2006

Last NPPES UpdateNovember 2, 2011

✔ NPI 1043245145 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in MA · 160611

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.

20 RESEARCH PL, N Chelmsford, MA 01863

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, 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 and accepts Medicare assignment

Michael G Bertos 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 ID5799855128

PECOS Enrollment IDI20120112000019

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

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

Lgh Professional Services LLC

2.0 mi

Internal Medicine

295 VARNUM AVE
Lowell, MA 01854

Reassigned Medicare billing, Massachusetts enrollment
10 clinicians in this Medicare group

NPI 1417485541 (978) 937-6000

Merrimack Valley Internal Medicine Ltc

11 mi

Internal Medicine

22 WEBBER AVE
Bedford, MA 01730

Reassigned Medicare billing, Massachusetts enrollment
5 clinicians in this Medicare group

NPI 1134054547 (978) 430-2975

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 14

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.

642 services379 patients

Initial nursing facility care with high level of medical decision making, per day, if using time, 50 minutes or more 99306

An initial nursing facility visit is your first meeting with your healthcare team at a nursing facility. Lasting typically 45 minutes, this appointment involves a comprehensive health assessment and the creation of your personalized care plan. It's a crucial step to ensure your health and well-being.

428 services373 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.

375 services145 patients

Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more 99308

A follow-up nursing facility visit per day is a daily check-up service provided by healthcare professionals. It lasts around 15 minutes and involves assessing your health status, monitoring your recovery progress, and addressing any concerns you may have about your health or treatment.

171 services116 patients

Assessment of emotional or behavioral problems 96127

Assessment of emotional or behavioral problems involves a thorough evaluation of your feelings, thoughts, and behaviors. It's a process where professionals study patterns over time to identify potential issues like anxiety, depression, or other mental health conditions.

110 services78 patients

Administration of influenza virus vaccine G0008

The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.

91 services91 patients

Influenza vaccine, inactivated 90653

The Influenza vaccine, inactivated, is a shot given to protect against the flu. It contains killed virus particles that help your body build immunity to the flu. It's recommended annually to keep your protection up-to-date. It's safe for ages 6 months and up.

77 services77 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.

69 services61 patients

Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes 99310

A follow-up nursing facility visit is a routine check-up that typically lasts about 35 minutes. During this visit, your health status is evaluated, any changes in your condition are noted, and necessary adjustments to your care plan are made. It's an essential part of maintaining your health.

63 services51 patients

Smoking and tobacco use intensive counseling, 4-10 minutes 99406

This service provides brief, intensive counseling (4-10 minutes) to support you in quitting smoking or tobacco use. It involves discussing the risks of tobacco use, benefits of quitting, and strategies to help you stop. It's a critical step towards a healthier lifestyle.

53 services32 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.

35 services22 patients

Smoking and tobacco use intensive counseling, 4-10 minutes 99406

24 services18 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.

23 services23 patients

Administration of pneumococcal vaccine G0009

The pneumococcal vaccine helps protect against pneumococcal bacteria, which can cause severe infections like pneumonia and meningitis. The vaccine is given as an injection, typically in the arm. It's recommended for infants, older adults, and those with certain health conditions.

12 services12 patients

Hospital Affiliations CMS Care Compare 5

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

Lowell General Hospital

Acute Care Hospitals · Lowell, MA

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220063

Location295 Varnum AvenueLowell, MA 01854 · Middlesex County

Emergency services Birthing friendly

Emerson Hospital -

Acute Care Hospitals · W Concord, MA

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220084

Location133 Old Road To 9 Acre CornerW Concord, MA 01742 · Middlesex 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

St Joseph Hospital

Acute Care Hospitals · Nashua, NH

4/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number300011

Location172 Kinsley StNashua, NH 03060 · Hillsborough County

Emergency services Birthing friendly

Exeter Hospital Inc

Acute Care Hospitals · Exeter, NH

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number300023

Location5 Alumni DriveExeter, NH 03833 · Rockingham County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 01863 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 35

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

20 suppliers48 claims127 services$5.85 avg. paid by Medicare

Lancets, per box of 100 A4259

DME-Medical/Surgical Supplies · category DA000N

15 suppliers24 claims37 services$0.98 avg. paid by Medicare

Insertion tray with drainage bag with indwelling catheter, foley type, two-way latex with coating (teflon, silicone, silicone elastomer or hydrophilic, etc.) A4314

DME-Orthotic Devices · category DF000N

1 supplier11 claims11 services$18.87 avg. paid by Medicare

Urinary catheter anchoring device, adhesive skin attachment, each A4333

DME-Orthotic Devices · category DF000N

1 supplier14 claims168 services$2.13 avg. paid by Medicare

Bedside drainage bag, day or night, with or without anti-reflux device, with or without tube, each A4357

DME-Orthotic Devices · category DF000N

1 supplier26 claims39 services$7.76 avg. paid by Medicare

Urinary drainage bag, leg or abdomen, vinyl, with or without tube, with straps, each A4358

DME-Orthotic Devices · category DF000N

1 supplier27 claims54 services$6.16 avg. paid by Medicare

Tape, non-waterproof, per 18 square inches A4450

DME-Medical/Surgical Supplies · category DA000N

2 suppliers26 claims2,200 services$0.10 avg. paid by Medicare

Tubing with integrated heating element for use with positive airway pressure device A4604

DME-Other DME · category DE001N

6 suppliers59 claims59 services$34.96 avg. paid by Medicare

Ostomy pouch, drainable; with barrier attached, (1 piece), each A5061

DME-Orthotic Devices · category DF010N

1 supplier11 claims220 services$2.79 avg. paid by Medicare

Skin barrier, wipes or swabs, each A5120

DME-Orthotic Devices · category DF010N

2 suppliers16 claims570 services$0.21 avg. paid by Medicare

For diabetics only, fitting (including follow-up), custom preparation and supply of off-the-shelf depth-inlay shoe manufactured to accommodate multi-density insert(s), per shoe A5500

DME-Orthotic Devices · category DF000N

4 suppliers20 claims40 services$60.36 avg. paid by Medicare

For diabetics only, multiple density insert, direct formed, molded to foot after external heat source of 230 degrees fahrenheit or higher, total contact with patient's foot, including arch, base layer minimum of 1/4 inch material of shore a 35 durometer or 3/16 inch material of shore a 40 durometer (or higher), prefabricated, each A5512

DME-Orthotic Devices · category DF000N

4 suppliers18 claims108 services$25.34 avg. paid by Medicare

Alginate or other fiber gelling dressing, wound cover, sterile, pad size 16 sq. in. or less, each dressing A6196

DME-Medical/Surgical Supplies · category DA023N

1 supplier51 claims2,221 services$7.02 avg. paid by Medicare

Composite dressing, sterile, pad size 16 sq. in. or less, with any size adhesive border, each dressing A6203

DME-Medical/Surgical Supplies · category DA023N

1 supplier14 claims375 services$3.26 avg. paid by Medicare

Gauze, impregnated with other than water, normal saline, or hydrogel, sterile, pad size 16 sq. in. or less, without adhesive border, each dressing A6222

DME-Medical/Surgical Supplies · category DA023N

1 supplier25 claims893 services$2.06 avg. paid by Medicare

Hydrocolloid dressing, wound cover, sterile, pad size 16 sq. in. or less, without adhesive border, each dressing A6234

DME-Medical/Surgical Supplies · category DA023N

1 supplier11 claims128 services$6.29 avg. paid by Medicare

Gauze, non-impregnated, sterile, pad size 16 sq. in. or less, without adhesive border, each dressing A6402

DME-Medical/Surgical Supplies · category DA023N

1 supplier17 claims1,450 services$0.11 avg. paid by Medicare

Conforming bandage, non-elastic, knitted/woven, sterile, width greater than or equal to three inches and less than five inches, per yard A6446

DME-Medical/Surgical Supplies · category DA023N

2 suppliers39 claims6,284 services$0.37 avg. paid by Medicare

Light compression bandage, elastic, knitted/woven, width greater than or equal to three inches and less than five inches, per yard A6449

DME-Medical/Surgical Supplies · category DA023N

1 supplier16 claims2,555 services$1.69 avg. paid by Medicare

Full face mask used with positive airway pressure device, each A7030

DME-Other DME · category DE001N

6 suppliers32 claims32 services$79.20 avg. paid by Medicare

Face mask interface, replacement for full face mask, each A7031

DME-Other DME · category DE001N

6 suppliers30 claims82 services$29.98 avg. paid by Medicare

Cushion for use on nasal mask interface, replacement only, each A7032

DME-Other DME · category DE001N

5 suppliers25 claims144 services$16.84 avg. paid by Medicare

Pillow for use on nasal cannula type interface, replacement only, pair A7033

DME-Other DME · category DE001N

3 suppliers12 claims71 services$13.76 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

5 suppliers39 claims39 services$49.64 avg. paid by Medicare

Headgear used with positive airway pressure device A7035

DME-Other DME · category DE001N

7 suppliers34 claims34 services$16.92 avg. paid by Medicare

Filter, disposable, used with positive airway pressure device A7038

DME-Other DME · category DE001N

6 suppliers63 claims361 services$1.91 avg. paid by Medicare

Filter, non disposable, used with positive airway pressure device A7039

DME-Other DME · category DE001N

4 suppliers16 claims16 services$5.25 avg. paid by Medicare

Water chamber for humidifier, used with positive airway pressure device, replacement, each A7046

DME-Other DME · category DE001N

5 suppliers27 claims27 services$11.15 avg. paid by Medicare

Hospital bed, fixed height, with any type side rails, with mattress E0250

DME-Hospital Beds · category DB000N

1 supplier12 claims12 services$42.58 avg. paid by Medicare

Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431

DME-Oxygen and Supplies · category DC000N

2 suppliers14 claims14 services$14.91 avg. paid by Medicare

Continuous positive airway pressure (cpap) device E0601

DME-Other DME · category DE001N

4 suppliers52 claims52 services$29.36 avg. paid by Medicare

Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390

DME-Oxygen and Supplies · category DC002N

5 suppliers42 claims42 services$71.42 avg. paid by Medicare

Standard wheelchair K0001

DME-Wheelchairs · category DD000N

1 supplier14 claims14 services$12.37 avg. paid by Medicare

Elevating leg rests, pair (for use with capped rental wheelchair base) K0195

DME-Wheelchairs · category DD021N

1 supplier14 claims14 services$5.64 avg. paid by Medicare

Portable gaseous oxygen system, rental; home compressor used to fill portable oxygen cylinders; includes portable containers, regulator, flowmeter, humidifier, cannula or mask, and tubing K0738

DME-Oxygen and Supplies · category DC000N

2 suppliers17 claims17 services$31.20 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.

HAYWARD K ZWERLING

Specialist

20 RESEARCH PL, SUITE 300
NORTH CHELMSFORD, MA 01863

Middlesex County (978) 459-0018

DR. IRVING J NEWMAN M.D.

Pediatrics

20 RESEARCH PL, 200
N CHELMSFORD, MA 01863

Middlesex County (978) 256-2828

JESSICA WIESELQUIST MD

Internal Medicine

20 RESEARCH PL, SUITE 130
NORTH CHELMSFORD, MA 01863

Middlesex County (978) 446-9850

LOUIS J BRESNICK M.D.

Internal Medicine

20 RESEARCH PL, SUITE 310
N CHELMSFORD, MA 01863

Middlesex County (978) 459-2152

MARYBETH MARCOTTE RNC

Nurse Practitioner (Obstetrics & Gynecology)

20 RESEARCH PL, SUITE 300
N CHELMSFORD, MA 01863

Middlesex County (978) 256-1858

INTEGRATED GASTROENTEROLOGY CONSULTANTS, PC

Physical Therapist

20 RESEARCH PL, SUITE 220
NORTH CHELMSFORD, MA 01863

Middlesex County (978) 459-6737

DR. MICHELLE COCHRAN MD

Specialist

20 RESEARCH PL, SUITE 320
NORTH CHELMSFORD, MA 01863

Middlesex County (978) 256-1858

DR. DEBORAH E FRANCIS M.D.

Pediatrics

20 RESEARCH PL, SUITE 200
NORTH CHELMSFORD, MA 01863

Middlesex County (978) 256-2828

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 Michael Bertos's NPI number?

The NPI number for Michael Bertos is 1043245145. It was assigned to this individual provider in the NPPES registry on July 11, 2006.

Where is Michael Bertos located?

Michael Bertos practices at 20 Research Pl Suite 310, N Chelmsford, MA 01863. The listed phone number is (978) 459-2152.

What is Michael Bertos's specialty?

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

Is Michael Bertos enrolled in Medicare?

Yes. Michael Bertos 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 Michael Bertos's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Michael Bertos reassigns Medicare benefits to 2 organizations: Lgh Professional Services LLC (Lowell, MA) and Merrimack Valley Internal Medicine Ltc (Bedford, MA). 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 Michael Bertos's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Michael Bertos accept?

Health plans from Anthem Blue Cross and Blue Shield and Taro Health list Michael Bertos 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.

Is Michael Bertos affiliated with any hospitals?

According to CMS data, Michael Bertos is affiliated with Lowell General Hospital, Emerson Hospital -, Lahey Hospital & Medical Center, Burlington, St Joseph Hospital and Exeter Hospital Inc.

When was this NPI record last updated?

The NPPES record for Michael Bertos was last updated on November 2, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.