Mary Nessan, DENTAL HYGIENIST
Dental Hygienist · Billings, MT
Mary Nessan, DENTAL HYGIENIST is a dental hygienist with a practice address in Billings, Montana, and NPI 1639789696, issued on Aug 5, 2020. Check the license (Montana 591, as entered in NPPES) with the Montana board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mary Nessan
- Credential
- DENTAL HYGIENIST
- Primary taxonomy
- Dental Hygienist 124Q00000X
- License number
- 591 MT
Self-reported in NPPES; status is on the state search - Practice location
- 123 S 27TH St, Billings, MT 59101
- Phone
- (406) 247-3333
- Enumerated
- Aug 5, 2020
- Record last updated
- Sep 25, 2020 (not updated in 6 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest dental hygienist records → All 159 in Montana → Look up another NPI →
Also registered at 123 S 27TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Doug AndersenSocial Worker1619392321
- Rachel AndersonRegistered Dietitian1174847099
- Tammi Anderson, LCPC, LACMental Health Counselor1083956783
Verify Mary Nessan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Montana board licenses this profession
Search for license 591Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% fewer Medicare Part D claims than the average dental hygienist in 2024
14 Medicare Part D claims, against an average of 75 among the 152 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Mary Nessan among 159 dental hygienist records in Montana
Mary Nessan, DENTAL HYGIENIST is one of 159 dental hygienist records with a practice address in Montana. 2% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 70% of them.
- NPI issued2020 · 70% of these records are older, 24% newer
- In a Medicare fileYes · 2% of these records are
- In the CMS Doctors and Clinicians fileNo · 0% of these records are
- Record last updated2020 · 74% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 124Q00000X and a Montana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Dental Hygienist providers in Montana
There are 159 dental hygienist records in Montana.
All 159 in Montana → Every provider in Billings → Dental Hygienist nationwide →
The 8 dental hygienist records with the nearest ZIP codes
- Barbara Deveraux, RDHBillings, MT 591011003080441
- Barbara FranckBillings, MT 591011598136194
- Kristin Gorder, RDHBillings, MT 591011902323421
- Tamara Helmer, RDHBillings, MT 591011073943312
- Shawnell Miller, RDHBillings, MT 591011356639207
- Kindra Munda, RDHBillings, MT 591011083391023
- Ty MyersBillings, MT 591011912367756
- Lynsee Openshaw, RDHBillings, MT 591011396176855
Common questions
What is Mary Nessan, DENTAL HYGIENIST's NPI number?
Mary Nessan, DENTAL HYGIENIST's National Provider Identifier (NPI) is 1639789696, issued on Aug 5, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Mary Nessan, DENTAL HYGIENIST located?
The NPPES record lists a practice address at 123 S 27TH St, Billings, MT, 59101. Phone: (406) 247-3333. Providers update this record themselves, so call before visiting.
How can I verify Mary Nessan, DENTAL HYGIENIST's license?
NPPES lists Montana license number 591, as entered by the provider. Search the Montana board that licenses this profession; the NPPES record confirms identity only.
How much does Mary Nessan, DENTAL HYGIENIST prescribe under Medicare Part D?
In 2024, Mary Nessan, DENTAL HYGIENIST had 14 Medicare Part D claims; the average among dental hygienist prescribers was 75. Part D covers Medicare prescriptions only.
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.