Dr. Mark Spencer, MD
- Medicare services, 2024
- 128
- Medicare patients, 2024
- 169
- Part D claims, 2024
- 164
- Hospital affiliations
- 3
- Industry payments
- $1,544
- Practice address
- 271 Carew St, Springfield, MA 01104
- Practice phone
- Call (413) 748-9000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Mercy Medical Center (MA)
Springfield, Massachusetts
Find Dr. Spencer's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Mark Spencer is an anesthesiologist in Springfield, Massachusetts
Dr. Spencer practices at Mercy Medical Center (MA) in Springfield, Massachusetts.
Dr. Spencer's NPI, 1508818097, was assigned on May 16, 2006. Dr. Spencer graduated from Georgetown University School of Medicine in 1991. Dr. Spencer holds Connecticut license 033719.
- NPI
- 1508818097NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1254515125
- NPI enumeration date
- May 16, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (413) 748-9000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 61
- Medical school graduation
- 1991
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark Spencer practices at Mercy Medical Center (MA) in Springfield, Massachusetts
Dr. Spencer's primary practice is Mercy Medical Center (MA), at 271 Carew St, Springfield, MA 01104 in Hampden County. The practice phone is (413) 748-9000.
- Mercy Medical Center (MA)271 Carew St, Springfield, MA 01104 · Hampden CountyPhone(413) 748-9000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Mark Spencer is affiliated with 4 sites of care and 1 medical group
Dr. Spencer's primary practice is Mercy Medical Center (MA) in Springfield, Massachusetts. Dr. Spencer is also affiliated with Baystate Medical Center. The medical group on file is Woodland Anesthesiology Associates. Dmand AI also links Dr. Spencer to 2 more hospitals, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Mark Spencer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Spencer practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mercy Medical Center (MA) | Available with a free account |
| +3 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 each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Mark Spencer is one of 1,552 anesthesiologists in Massachusetts
Anesthesiology is Dr. Spencer's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Spencer is licensed in Connecticut.
Specialties and state licenses
- Anesthesiology, ConnecticutPrimary
Anesthesiologists near Dr. Spencer
Counts of anesthesiologists 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. Mark Spencer billed Medicare for 128 services in 2024
CMS data shows 128 Medicare services from Dr. Spencer across 6 procedure codes in 2024, for 169 Medicare patients. Medicare paid $9,154 for them.
Dr. Spencer's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Anesthesia
- 2023: 122024: 57375%
- Office and hospital visits
- 2023: 162024: 43169%
- Surgery
- 2023: 192024: 2847%
Where Dr. Spencer's Medicare services took place, 2024
- In an office7155%
- In a facility5745%
Dr. Spencer compared with the Massachusetts median for anesthesiologists, 2024
- Dr. Spencer
- Massachusetts median
- Medicare services
- 128vs 126Close to median
- Medicare patients
- 169vs 20016% below
- Part D claims
- 127vs 294.4 times
Medians across 1,366 anesthesiologists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Spencer's 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.
Need commercial claims for Dr. Spencer?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Spencer and other anesthesiologists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark Spencer treated 169 Medicare patients in 2024, average age 72
CMS counts 169 Medicare patients who saw Dr. Spencer in 2024. The largest group is 65 to 74, with 81 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 25% are also on Medicaid. Their average risk score is 1.26, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Spencer's median patient age at 64, with 56% women.
Dr. Spencer's Medicare patients by age, 2024
Dr. Spencer's Medicare patients by sex, 2024
- Women9858%
- Men7142%
Chronic conditions among Dr. Spencer's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis55%
- Anxiety32%
- Mood disorders31%
- Diabetes30%
- Depression27%
- Chronic kidney disease24%
Share of Medicare patients with each condition. A patient can have several.
Dr. Spencer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 64
Patient panel by sex, all payers
- Women56%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mark Spencer wrote 164 Medicare Part D claims in 2024
In 2024, Dr. Spencer wrote 164 Medicare Part D claims for 28 patients. 95% of them were for generic drugs. CMS names the drug for 127 of them, across 5 drugs with 11 or more claims each, at $1,194 in total drug cost. In 2023, CMS named 89 claims across 5 drugs.
Dr. Spencer's Part D claims by kind of drug, 2024
- Generic155 claims95%
- Brand-name and other9 claims5%
Dr. Spencer's 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. Spencer's Part D claims, 2024
- Opioids49%81 of 164 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: 892024: 12743%
Drugs named by CMS: 5 in 2024, 5 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. Mark Spencer offers telehealth to Medicare patients
Dr. Spencer accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Spencer as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Mark Spencer received $1,544 in industry payments from 2016 to 2025
CMS Open Payments shows 75 general payments to Dr. Spencer from 21 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 98% of the total. Merck Sharp & Dohme Corporation paid the most, $545.
General payments to Dr. Spencer by program year, 2016 to 2025
General payments to Dr. Spencer by kind, 2016 to 2025
- Food and beverage$1,50698%
- Education$382%
Companies that paid Dr. Spencer the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mark Spencer graduated from Georgetown University School of Medicine
Dr. Spencer graduated from Georgetown University School of Medicine in 1991.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark Spencer'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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) |
| Industry payments | Open Payments (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. Mark Spencer
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. Mark Spencer's NPI number?
Dr. Mark Spencer's NPI number is 1508818097. It was assigned on May 16, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark Spencer?
Dr. Mark Spencer is an anesthesiologist in Springfield, Massachusetts. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. Mark Spencer practice?
Dr. Spencer practices at 271 Carew St, Springfield, MA 01104. Dr. Spencer's primary practice is Mercy Medical Center (MA) in Springfield, Massachusetts. Dmand AI also links Dr. Spencer to 2 hospitals.
What is Dr. Mark Spencer's office phone number?
The practice phone on file for Dr. Spencer is (413) 748-9000.
What is Dr. Mark Spencer's medical license number?
Dr. Spencer holds Connecticut license 033719.
Which hospitals is Dr. Mark Spencer affiliated with?
Dr. Spencer is affiliated with Baystate Medical Center. Dmand AI links Dr. Spencer to 2 more hospitals.
What medical group is Dr. Mark Spencer part of?
Dr. Spencer is linked to Woodland Anesthesiology Associates.
Does Dr. Mark Spencer accept Medicare?
Yes. CMS data shows Dr. Spencer billed Medicare for 128 services in 2024, and Dr. Spencer accepts Medicare assignment.
Does Dr. Mark Spencer offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Spencer as offering telehealth services.
How many Medicare patients does Dr. Mark Spencer see?
CMS counts 169 Medicare patients who saw Dr. Spencer in 2024, with an average age of 72.
Show 5 more questionsShow fewer questions
What services does Dr. Mark Spencer bill to Medicare?
In 2024, Dr. Spencer's most billed Medicare services were care management and other visits (99443), surgery: brain, spine and nerves (62323) and anesthesia (00811).
Where did Dr. Mark Spencer go to medical school?
Dr. Spencer graduated from Georgetown University School of Medicine in 1991.
What drugs does Dr. Mark Spencer prescribe most?
In 2024 Medicare Part D data, Dr. Spencer's most prescribed drugs by claims were Tramadol HCl, Gabapentin and Carisoprodol.
Has Dr. Mark Spencer received payments from drug or device companies?
CMS Open Payments shows $1,544 in general payments to Dr. Spencer from 21 companies from 2016 to 2025. The largest total came from Merck Sharp & Dohme Corporation.
How long has Dr. Mark Spencer been practicing?
Dr. Spencer graduated from medical school in 1991, 35 years ago.
Selling to anesthesiology practices?
See anesthesiologists in Massachusetts by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card