Dr. Cathleen M. Ammann, MD
- Medicare services, 2024
- 878
- Medicare patients, 2024
- 315
- Part D claims, 2024
- 424
- Hospital affiliations
- 2
- Industry payments
- $25
- Practice address
- 789 Central Ave, Dover, NH 03820
- Practice phone
- Call (603) 740-2580
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Ammann'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. Cathleen M. Ammann is a hospitalist in Dover, New Hampshire
Dr. Ammann practices at Wentworth-Douglass Hospital in Dover, New Hampshire, part of Mass General Brigham.
Dr. Ammann's NPI, 1821179540, was assigned on October 18, 2006. Dr. Ammann graduated from Emory University School of Medicine in 1996. Dr. Ammann holds New Hampshire license 11233.
- NPI
- 1821179540NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9537193073
- NPI enumeration date
- October 18, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (603) 740-2580
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 56
- Medical school graduation
- 1996
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Cathleen M. Ammann practices at Wentworth-Douglass Hospital in Dover, New Hampshire
Dr. Ammann's primary practice is Wentworth-Douglass Hospital, at 789 Central Ave, Dover, NH 03820 in Strafford County. The practice phone is (603) 740-2580.
- Wentworth-Douglass Hospital789 Central Ave, Dover, NH 03820 · Strafford CountyPhone(603) 740-2580
Source: Dmand AI Affiliation Data
Dr. Cathleen M. Ammann is affiliated with 4 sites of care and 2 medical groups
Dr. Ammann's primary practice is Wentworth-Douglass Hospital in Dover, New Hampshire, part of Mass General Brigham. Dr. Ammann is also affiliated with Portsmouth Regional Hospital. The medical group on file is Wentworth-Douglass Hospital. Dmand AI also links Dr. Ammann to 1 more therapy and rehab clinic, 1 skilled nursing facility and 1 medical group, 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. Cathleen M. Ammann's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ammann practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Wentworth-Douglass Hospital | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Cathleen M. Ammann is one of 122 hospitalists in New Hampshire
Hospitalist is Dr. Ammann's primary specialty in the NPI Registry, under taxonomy code 208M00000X. Dr. Ammann is licensed in New Hampshire.
Specialties and state licenses
- Hospitalist, New HampshirePrimary
Hospitalists near Dr. Ammann
Counts of hospitalists 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. Cathleen M. Ammann billed Medicare for 878 services in 2024
CMS data shows 878 Medicare services from Dr. Ammann across 7 procedure codes in 2024, for 315 Medicare patients. Medicare paid $66,968 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Ammann's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 8342024: 8785%
Dr. Ammann compared with the New Hampshire median for hospitalists, 2024
- Dr. Ammann
- New Hampshire median
- Medicare services
- 878vs 54063% above
- Medicare patients
- 315vs 26021% above
- Part D claims
- 229vs 455.1 times
Medians across 128 hospitalists in New Hampshire with Dmand AI profiles that report each measure.
Dr. Ammann'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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Ammann and other hospitalists in New Hampshire.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Cathleen M. Ammann treated 315 Medicare patients in 2024, average age 76
CMS counts 315 Medicare patients who saw Dr. Ammann in 2024. The largest group is 75 to 84, with 118 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 19% are also on Medicaid. Their average risk score is 2.35, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Ammann's median patient age at 74, with 60% women.
Dr. Ammann's Medicare patients by age, 2024
Dr. Ammann's Medicare patients by sex, 2024
- Women16352%
- Men15248%
Chronic conditions among Dr. Ammann's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis58%
- Anxiety51%
- Heart failure50%
- Chronic kidney disease49%
- Ischemic heart disease46%
- Mood disorders45%
Share of Medicare patients with each condition. A patient can have several.
Dr. Ammann's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 74
Patient panel by sex, all payers
- Women60%
- Men39%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Cathleen M. Ammann wrote 424 Medicare Part D claims in 2024
In 2024, Dr. Ammann wrote 424 Medicare Part D claims for 136 patients. 95% of them were for generic drugs. CMS names the drug for 229 of them, across 13 drugs with 11 or more claims each, at $13,633 in total drug cost. In 2023, CMS named 497 claims across 22 drugs.
Dr. Ammann's Part D claims by kind of drug, 2024
- Generic401 claims95%
- Brand-name23 claims5%
Dr. Ammann'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. Ammann's Part D claims, 2024
- Opioids3%14 of 424 claims
- Antibiotics12%51 of 424 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: 4972024: 22954%
Drugs named by CMS: 13 in 2024, 22 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
How Dr. Cathleen M. Ammann takes part in Medicare
Dr. Ammann accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Cathleen M. Ammann received $25 in industry payments in 2016
CMS Open Payments shows 1 general payment to Dr. Ammann from 1 drug or device company in 2016. Food and beverage make up the largest share, 100% of the total. Bristol-Myers Squibb Company paid the most, $25.
Companies that paid Dr. Ammann the most, 2016 to 2016
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Cathleen M. Ammann graduated from Emory University School of Medicine
Dr. Ammann graduated from Emory University School of Medicine in 1996.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Cathleen M. Ammann'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) |
| 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. Cathleen M. Ammann
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. Cathleen M. Ammann's NPI number?
Dr. Cathleen M. Ammann's NPI number is 1821179540. It was assigned on October 18, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Cathleen M. Ammann?
Dr. Cathleen M. Ammann is a hospitalist in Dover, New Hampshire. The primary specialty in the NPI Registry is Hospitalist Physician (taxonomy code 208M00000X).
Where does Dr. Cathleen M. Ammann practice?
Dr. Ammann practices at 789 Central Ave, Dover, NH 03820. Dr. Ammann's primary practice is Wentworth-Douglass Hospital in Dover, New Hampshire, part of Mass General Brigham. Dmand AI also links Dr. Ammann to 1 therapy and rehab clinic, 1 skilled nursing facility and 1 medical group.
What is Dr. Cathleen M. Ammann's office phone number?
The practice phone on file for Dr. Ammann is (603) 740-2580.
What is Dr. Cathleen M. Ammann's medical license number?
Dr. Ammann holds New Hampshire license 11233.
Which hospitals is Dr. Cathleen M. Ammann affiliated with?
Dr. Ammann practices at Wentworth-Douglass Hospital in Dover, New Hampshire. Dr. Ammann is also affiliated with Portsmouth Regional Hospital.
What medical group is Dr. Cathleen M. Ammann part of?
Dr. Ammann is linked to Wentworth-Douglass Hospital. Dmand AI links Dr. Ammann to 1 more medical group.
Does Dr. Cathleen M. Ammann accept Medicare?
Yes. CMS data shows Dr. Ammann billed Medicare for 878 services in 2024, and Dr. Ammann accepts Medicare assignment.
How many Medicare patients does Dr. Cathleen M. Ammann see?
CMS counts 315 Medicare patients who saw Dr. Ammann in 2024, with an average age of 76.
What services does Dr. Cathleen M. Ammann bill to Medicare?
In 2024, Dr. Ammann's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99233) and hospital inpatient care (99239).
Show 4 more questionsShow fewer questions
Where did Dr. Cathleen M. Ammann go to medical school?
Dr. Ammann graduated from Emory University School of Medicine in 1996.
What drugs does Dr. Cathleen M. Ammann prescribe most?
In 2024 Medicare Part D data, Dr. Ammann's most prescribed drugs by claims were Levothyroxine Sodium, Metoprolol Succinate and Prednisone.
Has Dr. Cathleen M. Ammann received payments from drug or device companies?
CMS Open Payments shows $25 in general payments to Dr. Ammann from 1 company from 2016 to 2016. The largest total came from Bristol-Myers Squibb Company.
How long has Dr. Cathleen M. Ammann been practicing?
Dr. Ammann graduated from medical school in 1996, 30 years ago.
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