Catharine Ann Arnold, MD
Rheumatology Physician · Guilford, CT
Catharine Ann Arnold, MD is a rheumatology physician with a practice address in Guilford, Connecticut, and NPI 1306909742, issued on Dec 18, 2006. Check the license (Connecticut 029833, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Catharine Ann Arnold
- Credential
- MD
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- 029833 CT
Self-reported in NPPES; status is on the state search - Practice location
- 385 Church St, Guilford, CT 06437
- Phone
- (203) 453-0361
- Enumerated
- Dec 18, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (203) 453-8510
- Medicare enrollment
- Enrolled (PECOS I20090625000012); accepts Medicare assignment
- Medical or professional school
- Yale University School Of Medicine, 1986
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 145 in Connecticut → Look up another NPI →
Also registered at 385 Church St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Michael Allegrini, PAPhysician Assistant1700949179
- Robert Anderson, OTOccupational Therapist1740505635
- Steven Berry, MSPTPhysical Therapist1740412873
- Melissa Boutagy, DPTPhysical Therapist1568844348
- Todd Cacopardo, MS,PTPhysical Therapist1851613319
- Susan Ginsburg, PT,MSPhysical Therapist1255413837
Verify Catharine Ann Arnold in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 029833Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.8 times the Medicare Part D claims of the average rheumatology physician in 2024
9,416 Medicare Part D claims for 880 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 273 claims were for opioids.
Most prescribed
- Prednisone417 claims
- Rosuvastatin Calcium410 claims
- Losartan Potassium379 claims
- Amlodipine Besylate375 claims
- Levothyroxine Sodium366 claims
- Hydroxychloroquine Sulfate335 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 93.3 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 2 group practices
- Northeast Medical Group IncGuilford, CT
- Yale UniversityNew Haven, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Catharine Ann Arnold among 145 rheumatology physician records in Connecticut
Catharine Ann Arnold, MD is one of 145 rheumatology physician records with a practice address in Connecticut. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 18% of them.
- NPI issued2006 · 18% of these records are older, 49% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated1986 · median 2004 among the 94 with a school on file
- Record last updated2007 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in Connecticut
There are 145 rheumatology physician records in Connecticut.
All 145 in Connecticut → Every provider in Guilford → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Miruna Carnaru, M.D.Guilford, CT 064371932632361
- Robert Schoen, MDGuilford, CT 064371689652208
- Micha Abeles, M.D.Meriden, CT 064501497751556
- Aryeh Abeles, M.D.Meriden, CT 064501285737155
- Golfam Fadaei, MDDerby, CT 064181780260562
- Don-Andre JacksonDerby, CT 064181508250952
- Divya Mamootil, MDDerby, CT 064181134794050
- Crispin Abarientos, M.D.Middletown, CT 064571124292966
Common questions
What is Catharine Ann Arnold, MD's NPI number?
Catharine Ann Arnold, MD's National Provider Identifier (NPI) is 1306909742, issued on Dec 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Catharine Ann Arnold, MD located?
The NPPES record lists a practice address at 385 Church St, Guilford, CT, 06437. Phone: (203) 453-0361. Providers update this record themselves, so call before visiting.
How can I verify Catharine Ann Arnold, MD's license?
NPPES lists Connecticut license number 029833, as entered by the provider. Search the Connecticut Medical Examining Board at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Catharine Ann Arnold, MD prescribe under Medicare Part D?
In 2024, Catharine Ann Arnold, MD had 9,416 Medicare Part D claims for 880 beneficiaries; the average among rheumatology physician prescribers was 1,978. Part D covers Medicare prescriptions only.
What is Catharine Ann Arnold, MD's MIPS final score?
The 2023 MIPS final score is 93.3 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.