Dr. Marissa E. Baltus, MD
- Medicare services, 2024
- 625
- Medicare patients, 2024
- 334
- Part D claims, 2024
- 4,123
- MIPS score, 2024
- 92
- Hospital affiliations
- 4
- Practice address
- 41 & 45 Mall Road, Burlington, MA 01803
- Practice phone
- Call (781) 744-5100
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Baltus' professional email, personal email and mobile number
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Dr. Marissa E. Baltus is an internist in Burlington, Massachusetts
Dr. Baltus practices at Lahey Clinic in Burlington, Massachusetts, part of Beth Israel Lahey Health.
Dr. Baltus' NPI, 1942308796, was assigned on September 20, 2006. Dr. Baltus graduated from Tufts University School of Medicine in 1988. Dr. Baltus holds Massachusetts license 74778.
- NPI
- 1942308796NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7517906738
- NPI enumeration date
- September 20, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (781) 744-5100
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 64
- Medical school graduation
- 1988
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Marissa E. Baltus practices at Lahey Clinic in Burlington, Massachusetts
Dr. Baltus' primary practice is Lahey Clinic, at 41 & 45 Mall Road, Burlington, MA 01803 in Middlesex County. The practice phone is (781) 744-5100.
- Lahey Clinic41 & 45 Mall Road, Burlington, MA 01803 · Middlesex CountyPhone(781) 744-5100
Source: Dmand AI Affiliation Data
Dr. Marissa E. Baltus is affiliated with 6 sites of care and 1 medical group
Dr. Baltus' primary practice is Lahey Clinic in Burlington, Massachusetts, part of Beth Israel Lahey Health. Dr. Baltus is also affiliated with Beth Israel Deaconess Medical Center. The medical group on file is Lahey Clinic. Dmand AI also links Dr. Baltus to 2 more hospitals, 1 group practice or clinic and 1 home health agency, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Marissa E. Baltus' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Baltus practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Lahey Clinic | Available with a free account |
| +5 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Beth Israel Lahey Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Marissa E. Baltus is one of 5,528 internists in Massachusetts
Internal medicine is Dr. Baltus' primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Baltus is licensed in Massachusetts.
Specialties and state licenses
- Internal medicine, MassachusettsPrimary
Internists near Dr. Baltus
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Marissa E. Baltus billed Medicare for 625 services in 2024
CMS data shows 625 Medicare services from Dr. Baltus across 5 procedure codes in 2024, for 334 Medicare patients. Medicare paid $28,792 for them.
Dr. Baltus' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4632024: 40313%
- Other services
- 2023: 312024: 222616%
Where Dr. Baltus' Medicare services took place, 2024
- In an office488%
- In a facility57792%
Dr. Baltus compared with the Massachusetts median for internists, 2024
- Dr. Baltus
- Massachusetts median
- Medicare services
- 625vs 43145% above
- Medicare patients
- 334vs 19472% above
- Part D claims
- 3,540vs 4028.8 times
Medians across 5,369 internists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Baltus' most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Marissa E. Baltus treated 334 Medicare patients in 2024, average age 77
CMS counts 334 Medicare patients who saw Dr. Baltus in 2024. The largest group is 75 to 84, with 135 patients. 74% of them have high cholesterol, and 63% have high blood pressure. 10% are also on Medicaid. Their average risk score is 1.12, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Baltus' median patient age at 69, with 74% women.
Dr. Baltus' Medicare patients by age, 2024
Dr. Baltus' Medicare patients by sex, 2024
- Women24373%
- Men9127%
Chronic conditions among Dr. Baltus' Medicare patients, 2024
- High cholesterol74%
- High blood pressure63%
- Arthritis47%
- Chronic kidney disease26%
- Ischemic heart disease24%
- Anxiety21%
- Diabetes21%
- Mood disorders21%
Share of Medicare patients with each condition. A patient can have several.
Dr. Baltus' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women74%
- Men25%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Marissa E. Baltus wrote 4,123 Medicare Part D claims in 2024
In 2024, Dr. Baltus wrote 4,123 Medicare Part D claims for 834 patients. 92% of them were for generic drugs. CMS names the drug for 3,540 of them, across 50 drugs with 11 or more claims each, at $177,161 in total drug cost. In 2023, CMS named 3,214 claims across 50 drugs.
Dr. Baltus' Part D claims by kind of drug, 2024
- Generic3,802 claims92%
- Brand-name and other321 claims8%
Dr. Baltus' most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Baltus' Part D claims, 2024
- Opioids0%17 of 4,123 claims
- Antibiotics1%25 of 4,123 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3,2142024: 3,54010%
Drugs named by CMS: 50 in 2024, 50 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Marissa E. Baltus scored 92 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 92 out of 100 for Dr. Baltus for performance year 2024, reported through an alternative payment model (APM). Dr. Baltus accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Baltus as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Baltus' MIPS scores, performance year 2024
- 92of 100Final score
- 76.6of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Marissa E. Baltus graduated from Tufts University School of Medicine
Dr. Baltus graduated from Tufts University School of Medicine in 1988.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Marissa E. Baltus's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Marissa E. Baltus
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Marissa E. Baltus' NPI number?
Dr. Marissa E. Baltus' NPI number is 1942308796. It was assigned on September 20, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Marissa E. Baltus?
Dr. Marissa E. Baltus is an internist in Burlington, Massachusetts. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Marissa E. Baltus practice?
Dr. Baltus practices at 41 & 45 Mall Road, Burlington, MA 01803. Dr. Baltus' primary practice is Lahey Clinic in Burlington, Massachusetts, part of Beth Israel Lahey Health. Dmand AI also links Dr. Baltus to 2 hospitals, 1 group practice or clinic and 1 home health agency.
What is Dr. Marissa E. Baltus' office phone number?
The practice phone on file for Dr. Baltus is (781) 744-5100.
What is Dr. Marissa E. Baltus' medical license number?
Dr. Baltus holds Massachusetts license 74778.
Which hospitals is Dr. Marissa E. Baltus affiliated with?
Dr. Baltus practices at Lahey Clinic in Burlington, Massachusetts. Dr. Baltus is also affiliated with Beth Israel Deaconess Medical Center. Dmand AI links Dr. Baltus to 2 more hospitals.
What medical group is Dr. Marissa E. Baltus part of?
Dr. Baltus is linked to Lahey Clinic.
Does Dr. Marissa E. Baltus accept Medicare?
Yes. CMS data shows Dr. Baltus billed Medicare for 625 services in 2024, and Dr. Baltus accepts Medicare assignment.
Does Dr. Marissa E. Baltus offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Baltus as offering telehealth services.
What is Dr. Marissa E. Baltus' MIPS score?
Dr. Baltus' MIPS final score for performance year 2024 is 92 out of 100, reported through an alternative payment model (APM).
Show 5 more questionsShow fewer questions
How many Medicare patients does Dr. Marissa E. Baltus see?
CMS counts 334 Medicare patients who saw Dr. Baltus in 2024, with an average age of 77.
What services does Dr. Marissa E. Baltus bill to Medicare?
In 2024, Dr. Baltus' most billed Medicare services were office visit, established patient (99214), medicare service (G2211) and office visit, established patient (99213).
Where did Dr. Marissa E. Baltus go to medical school?
Dr. Baltus graduated from Tufts University School of Medicine in 1988.
What drugs does Dr. Marissa E. Baltus prescribe most?
In 2024 Medicare Part D data, Dr. Baltus' most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Lisinopril.
How long has Dr. Marissa E. Baltus been practicing?
Dr. Baltus graduated from medical school in 1988, 38 years ago.
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