Mark Joseph Titi, MD
Allergy & Immunology Physician · Lancaster, PA
Mark Joseph Titi, MD is an allergy & immunology physician with a practice address in Lancaster, Pennsylvania, and NPI 1649268525, issued on Oct 13, 2005. Check the license (Pennsylvania MD043419L, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Mark Joseph Titi
- Credential
- MD
- Primary taxonomy
- Allergy & Immunology Physician 207K00000X
- License number
- MD043419L PA
Self-reported in NPPES; status is on the state search - Practice location
- 2445 Marietta Ave, Lancaster, PA 17601
- Phone
- (717) 393-1365
- Enumerated
- Oct 13, 2005
- Record last updated
- Oct 7, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (717) 393-8540
- Medicaid ID
- 001454732 PA
- Medicare enrollment
- Enrolled (PECOS I20100916000055); accepts Medicare assignment
- Medical or professional school
- University Of Maryland School Of Medicine, 1988
- Entity
- Type 1 · individual
8 nearest allergy & immunology physician records → All 183 in Pennsylvania → Look up another NPI →
Also registered at 2445 Marietta Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Clark Kaufman, MDSpecialist1326036468
- Stephen Lockey, MDAllergy & Immunology Physician1649269416
- Robin Rochow, PA-CPhysician Assistant1356590186
Verify Mark Joseph Titi in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD043419LCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
5% more Medicare Part D claims than the average allergy & immunology physician in 2024
778 Medicare Part D claims for 191 beneficiaries, against an average of 741 among the 2,899 providers of this specialty who prescribed in Part D. Brand-name drugs were 43% of claims.
Most prescribed
- Azelastine Hcl119 claims
- Albuterol Sulfate Hfa60 claims
- Montelukast Sodium59 claims
- Prednisone52 claims
- Budesonide-Formoterol Fumarate34 claims
- Advair Hfa31 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.
Industry payments in 2024: $903.61
38 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 2,496 providers of this specialty with any payment received $8,321.81 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Allergy And Asthma Center PCLancaster, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Joseph Titi among 183 allergy & immunology physician records in Pennsylvania
Mark Joseph Titi, MD is one of 183 allergy & immunology physician records with a practice address in Pennsylvania. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 79% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1988 · median 2000 among the 109 with a school on file
- Record last updated2014 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207K00000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Allergy & Immunology Physician providers in Pennsylvania
There are 183 allergy & immunology physician records in Pennsylvania.
All 183 in Pennsylvania → Every provider in Lancaster → Allergy & Immunology Physician nationwide →
The 8 allergy & immunology physician records with the nearest ZIP codes
- Amanda Bittner, MDLancaster, PA 176011093703134
- Laura Fisher, MDLancaster, PA 176011376619387
- Stephen Lockey, MDLancaster, PA 176011649269416
- Nathaniel Hare, M.D.Williamsport, PA 177011598974560
- Amy Auerbach, M.D.York, PA 174031831392877
- David Axelrod, M.D.York, PA 174031073540076
- Nicholas Orfan, M.D.York, PA 174031366466971
- Michael Facktor, M.D.Danville, PA 178221467436592
Common questions
What is Mark Joseph Titi, MD's NPI number?
Mark Joseph Titi, MD's National Provider Identifier (NPI) is 1649268525, issued on Oct 13, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mark Joseph Titi, MD located?
The NPPES record lists a practice address at 2445 Marietta Ave, Lancaster, PA, 17601. Phone: (717) 393-1365. Providers update this record themselves, so call before visiting.
How can I verify Mark Joseph Titi, MD's license?
NPPES lists Pennsylvania license number MD043419L, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark Joseph Titi, MD prescribe under Medicare Part D?
In 2024, Mark Joseph Titi, MD had 778 Medicare Part D claims for 191 beneficiaries; the average among allergy & immunology physician prescribers was 741. 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.